removed ThreadStatic fields, using Context Statics

XML DOM updates

Fix the falling test by adding @ before the call.

PHP uses DOMText in cases where .NET uses XmlWhitespace and
XmlSignificantWhitespace.

DOMCharacterData, DOMText, DOMCdataSection and DOMComment. Extend the
test to cover them.

Fundamentals of XML DOM

Use just the instance calls for now.

* fewer stackovrfl

- updated NuGets
- reflection hides internal Peachpie interfaces
- IPhpConvertible.ToArray()
- c...

check for circular base

- matching newline characters correctly

- displaying PHP exception message when catching CLR System.Exception

0.8.0

Adds support for C# 7 tuples.

- base ctor which implements fields only initialization used properly

Types override

- `_index` is not var_dumped or printed or exported

- public attach() is not called within other internal functions

- same internal structure as in PHP
- iterating and modifying storage allowed
- methods overridable

Use standard Throwable interface.

- Object, Exception, IPhpCallable etc. won't be visible to reflection if
implemented on a PHP ob...

- fixes .filter scope generation
- unbound type, ambiguous type, interface can be catch

(does not work yet)

- passing by ref if it is not possible

- allows foreach in C#

- AccessMask

- helper `ResolvePhpTypeInfo` not declared in PHP class

- fix for `(array)&$nonarray` returned NULL instead of array

- well-known assemblies are not loaded into AppDomain when app startups

Reflection methods

- warnings are reported instead of throwing `NotImplementedException`

`LoadFrom()` respects shadow copying => no locked files in Bin folder

PHP reflection doesn't "see" CLR properties with indexers