Scan workspace library on every program startup

Remove and ignore library_cache.sqlite

This makes sure that the workspace library SQLite database is always
available and up to date.

The constructor of QSqlQuery already executes the query, so it was
accidentally executed twice.

- Enable Write-Ahead Logging to allow concurrent reading and writing to
the database (see http...

It seems that this has been forgotten in
bed2415a08d02c9900fd0c855581a08570b5d7e6.

Travis-CI: Cleanup configuration

If an error occurs while cloning from or pushing to GitHub, the error
output may contain the sec...

This makes the whole Travis-CI configuration much more clear.

This secret is now stored in the web interface of Travis to keep
the file ".travis.yml" as clear...

It seems that these TODOs are already fixed, but were not removed from
the comments...

GraphicsView: Pan with middle mouse button instead of right button

Until now, the context menu in the GraphicsView of the SchematicEditor
and BoardEditor did not a...

Because the right mouse button conflicts with the context menu, the
middle mouse button is now u...

This way we have an optical indicator which shows whether the
GraphicsView is in panning mode or...

- Changed mixedCase filenames to snake_case
- Replaced hyphens with underscores

Sort entries of HEADERS, SOURCES and FORMS in *.pro files

This script sorts the entries of HEADERS, SOURCES and FORMS variables in
all qmake project files...

* README: Add Mac OS X installation guide
* AUTHORS: Add schmijos to contributors

https://doc.qt.io/qtcreator/creator-tips.html#adding-a-license-header-template-for-c-code

- Fix wrong paths to input (source) directories
- Add more information for developers

Directory and namespace structure refactoring

- Old location: ./libs/librepcb/workspace/library/manager/
- New location: ./libs/librepcb/libra...

- Move ./librepcb to ./apps/librepcb
- Move all projects from ./tools/ into ./apps/

- Update qmake project files
- Update include statements

- Move all libraries from ./libs/ into ./libs/librepcb/
- Remove prefix "librepcb" from all libr...

Replace GoogleMock directory with a submodule

- missing "override" keywords
- exception specifier mismatch between declaration and definition

This reduces the size of the LibrePCB-Doxygen repository (GitHub pages
fails to build the page i...

Add workspace library manager

New classes in workspace namespace:
- AddLibraryWidget
- LibraryInfoWidget
- LibraryListWidgetIt...

Template methods:
- getAttribute()
- setAttribute()

Add network access manager

- Install packages zlib1g, zlib1g-dev and openssl
- Run QuaZIP unit tests

These new classes can be used to execute network requests:
- NetworkAccessManager: Executes net...

Following functions are now thread-safe:
qDebug(), qInfo(), qWarning(), qCritical() and qFatal()

Use Q_DECLARE_METATYPE() and qRegisterMetaType() to register the class
FilePath as a meta type. ...

- UuidTest/SystemInfoTest: Replace ASSERT_*() macros with EXPECT_*()
- DirectoryLockTest/SystemI...

Workspace refactoring

- Update workspace directory structure to new format
- Update demo projects

- Update ProjectLibraryUpdater
- Update WorkspaceLibraryUpdater

A progress bar is added to the ControlPanel's status bar.

- Add attribute "deprecated" to LibraryBaseElement
- Add method isOpenedReadOnly()
- Add static ...

- Use separate output directories for each project version
- Implement escaping of output filena...

- "component_instances" -> "components"
- "component_instance" -> "component"

Spice models are not yet supported by LibrePCB, so I have just removed
all spice model related s...

If a workspace was used by a newer application version and then is
opened with an older version ...

- Add method isValidProjectDirectory()
- Add method getProjectFileFormatVersion()
- Replace raw ...

- Update to the new workspace directory structure
- Add methods to work with libraries (library:...

The version string can be changed in the ProjectPropertiesEditorDialog.
The creation datetime is...

- Use the new common class SQLiteDatabase
- Add new method getElementTranslations()
- Remove met...

The Windows API function GetModuleFileNameExW() seems to be a nightmare.
Hopefully QueryFullPro...

Add Uuid unit tests

- Make UUIDs always lowercase
- Make Uuid object invalid when setUuid() returns false
- Make ope...

Refactor/rename common class FileLock

Fixes #14

- Lock whole directories instead of single files
- Change lock file basename from ".~lock.FILENA...

- Implement method getFullUsername() for Windows
- Cache results of getUsername(), getFullUserna...

The class FilePath should only provide methods to deal with file paths,
and not to make changes ...

Only reported by Clang, not by GCC.

Improve versioning system