Reduce RAM usage: Avoid keeping a copy of the preprocessed source files content during checking.
Fixed two invalid TODO tests
Added support for member variables in Check64BitPortability::pointerassignment()
Support do-loops in CheckStl::stlOutOfBounds()
Some small refactorizations:
- Removed redundant calls to std::string constructor
- Use default parameters in some places
Fixed GUI bug: file test.cpp is loaded from file if scratchpad is empty.

The underlying problem was in lib and is fixed by changing the behaviour of CppCheck::check(). Checking is performed on empty content without attempt to load from file.
Add VS2013 projects for my personal use (using /LTCG, /MP, /RELEASE, /MT).

[ci skip]
Add a script to run coverity with VS2013.

[ci skip]
Move astyle options to astyle.ini.

This way we can use it in runastyle and runastyle.bat.

Settings changes:
* specify the files to exclude instead of specifying the files to style
* remove `--lineend` option
* keep the file's modified timestamp
* only show the styled files on the command output

Also change the astyle version check to only check for older not the exact version.

[ci skip]
Update runastyle.bat from MPC-HC.

It includes a check if astyle is present and for astyle's version.
Also, it allows drag and dropping files onto it to style them.

[ci skip]
PEP8 fixes.