Fixed false negative #5985: default argument values should not affect variable usage checking.
ValueFlow: start adding valueflow handling of strings and pointer aliases
Fixed Cppcheck warning
BufferOverrun: Use ValueFlow string values more
Improved cstyleCast check:
- Detect casting of literals
- Check initializer lists (#3630)
Fixed recently introduced FP when C-Style casting nullpointers
Refactorized CheckAutoVariables::assignFunctionArg():
- Splitted message into style message (assigning non-pointers) and warning message (assigning pointers)
- Support operator++/-- (#4793)
ValueFlow: Handle string values in valueFlowSubFunction
ValueFlow: Better handling of calculated function arguments in valueFlowSubFunction
Fixed Cppcheck warning about 'null pointer dereference or redundant condition'
Dead pointer: Added checking for dead pointer usage when pointer alias local variable that has gone out of scope.
ValueFlow: Improved analysis of assignments
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.