versioning

[zeratax]

Is your feature request related to a problem? Please describe.
currently we have to change the version number in

• include/yacx/main.hpp
• doxyfile
• CMakeList

Describe the solution you'd like
I would like to only change it in one location and have the other locations pull it from there

btw: I want to make a 0.4.2 and in general I want to keep track of changes, so if @LukasSiefke could write a changelog for the JNI in form of https://github.com/ZerataX/yacx/blob/master/CHANGELOG.md that would be super useful. I know it's just for me, but I do love it a lot

[LukasSiefke]

Changes

• more java- and scala-examples
• JNI
  • benchmark kernels
  • junit tests
  • throw java-execption when passing illegal arguments (such as null)
  • split up KernelArg-class into BooleanArg, ByteArg, ShortArg, IntArg, LongArg, FloatArg, DoubleArg-classes
  • executor-class for easily launch and benchmark kernels

[zeratax]

going to create that as soon as possible, but after we've merged the whole sbt stuff we should create a v0.5.0