enable unity build on OpenMS lib (this required some fixes for unclean variable names and solution for ambiguous classes (std::set vs seqan::set), compilation time on Windows is reduced to <10% (5min vs 45min) on Ultrabook
fix attempt by omitting offending include
merge develop
fixes for linux and VS2013
unity build for GUI
[FIX] fixed warnings in CONCEPTS
fixed some clang warnings

Conflicts:
	src/openms/include/OpenMS/KERNEL/PeakIndex.h
[FIX] fixed shadow warning
[FIX] shadow warning
[FIX] fixed windows linker error in ConversionHelper::convert
fixed some overoptimizations which prevent compilation in non-unity mode
Merge pull request #770 from mcmenace/streamfix_stephan

[FIX] fixed some clang warnings in stream manipulation
Merge pull request #756 from cbielow/unityBuild

[FEATURE,BUILD] Support unity builds in OpenMS to increase win compile performance
Merge pull request #771 from jleclaire/new_Warnings

[NOP] Shadow warnings
Merge pull request #768 from mcmenace/warningfix

[FIX] fixed warnings in CONCEPTS
[FIX] fixed compile issue with unity build due to duplicated/wrong header guards
[BUILD,PYOPENMS] fix pyOpenMS build

- move overloaded functions into a class (pyOpenMS currently cannot deal
  with overloaded global functions)
- write tests for conversion