Modify some code to get a good style

Make some inline functions out-line

Make the HttpClient class support cookies

Add the StaticFileRouter class

clang-format

Change the line length limit to 80 characters

Add .clang-format

Modify the HttpRequestParser class to improve performance

Add the forward() method to the framework

Change the callback type in Filters and AOP Advices

Change the type of the callback in handlers to r-reference type

Return index.html to the client requesting '/'

Disable cookies on 404 pages

Add two configuration options

Change version to 0.9.33

Implement gzip_static

Enable users to specify a preferred installation location

Modify some interfaces

Add the content() method into the HttpRequest class

Check whether the port is in use

Modify shared library loading

Handle demangle error

Change escapes from '{{}}' to '[[]]' in views

Support host strings with IPv6 address in the HttpClient class

Add the getHandlersInfo() method

Modify AOP

Add support for AOP

Add some methods using std::chrono_literals

Add the OPTIONS method

Optimize database operations

Add the setCustom404Page() method

Modify the implementation of WebSocket

Add FastDbClient instances into the main event loop

Modify the pipeling test

Add WebSocket client support

Make WebSocket suitable for Firefox browser

Fix a websocket bug in Linux and add ws_test.html for testing