Convert MathLib::toLongNumber() from template member function to toLongNumber() and toULongNumber() to avoid various problems compiling with Visual Studio
Fixed some coverity findings about dead code, fixed a misleading comment
Code cleanup of stack depth tracking. Replaced class with simple POD variable.
Use constant instead of magic number for AST recursion limit

[ci skip]
astyle formatting

[ci skip]
Implemented a slower but shorter version of MathLib::isNullValue() as suggested by PKeuS. Removed not needed test cases. Improved doxygen documentation for MathLib::IsNullValue().
Add VS2013 projects for my personal use (using /LTCG, /MP, /RELEASE, /MT).
Add a script to run coverity with VS2013.
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.
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.
Remove multiple newlines.
Update project files for the recent translation changes.
Tweak sorttable.js.
htodcs: minor cleanup.