Add Change Log for Open Beta RC2
Update Changelog

- @f-schmitt-zih thx!
Merge pull request #107 from ax3l/release/beta-rc2

Release/beta rc2
Merge pull request #112 from ComputationalRadiationPhysics/master

Merge Master ChangeLog
add commentary for cuSTL::container
add commentary for cuSTL::cursor
refine cuSTL::cursor commentary
add commentary to cuSTL::algorithm partially
add commentary for cuSTL::algorithm
add commentary in cuSTL::container and cuSTL::zone
enhance commentary in cuSTL::cursor::tools
remove bad token
correct commentary in cuSTL/algorithm/cudaBlock/Foreach.hpp
fix minor comment issues
save file cuSTL/container/view/View.hpp
Merge pull request #116 from Heikman/cuSTLCommentary

cuSTL commentary