Add Beta-RC5 Change Log
Document Missing .param/.unitless Changes

- cd src/picongpu/include/simulation_defines/
- git diff master.. .
Add Release Date (Wednesday, 28th of May)
fix MovingWindow

- slide counter were increment also if moving window was disabled
fix bug in type evaluation

- fix that const or reference type was used to create memory
fix comment
Add Note On Guards in Output/Checkpoints
Document #448 Reduce Fix Backporting
Update Release Date and PS Comment 3D
Merge pull request #454 from ComputationalRadiationPhysics/release-beta-rc5-fixes

Beta-RC5 Release
Merge pull request #471 from ComputationalRadiationPhysics/master

Update dev with RC5 release changes