Merge branch 'develop'
public release

* NEW: Option for ignoring POST actions if the build failed.
* CHANGED: Major changes & fixes with the MSBuildParser.
* CHANGED: Improve work performance with the properties of projects
debug mode & added 14.0 to SupportedProducts: tested with - 14 CTP 14.0.21901.1 DP
fixed _treatNewlineAs with hModeFile
Versioning with vsSBE - depends on itself
public release

* NEW: Support for Visual Studio 14.0
* FIXED: trivial bug with "Keep window with result" in Files Mode
modified DTEProjects - Issue #11

+ avoid Revision for tag-version in vsixmanifest
Fixed evaluateVariable :: #12 "Saves property .. after evaluating"

* _modifySlash removed as deprecated - now we use the MSBuild Property Functions if needed (available with v0.6)
Implemented Issue #13 - Dynamically define variables

key points:
* user variables with simple thread-safe collection
* +TPreparedData structure for all points of analyzer
* persistence mode is reserved
* currently not parsed all internal projects from variable - marked as TODO
Unit tests on MSBuildParser & OWP