Add FindSplash.cmake

- add components support for PARALLEL
- add version support

Note: HDF5 tends to add *some* mpi libs already. but the same
problem as with bullxmpi happens if one does not link the _cxx
part, too. So we decide to add them anyway to be sure.
Add FindSplash to png2gas/splash2txt
Move splash2txt to src/tools
Move Dir with Modules down to src/
Add Install Routines for splash2txt
Update Install Instructions for Tools
Use less error-prune static lib option

the manipulation should affect as less other stuff as possible,
e.g. double linking a shared and a static mpi library will fail
in most of the cases with weird errors
Fix Typo and Writing Rene
LICENSE.md new path of splash2txt
Merge pull request #304 from ax3l/topic-splashCmakeModule

Splash FindPackage CMake Module
change Frame template interface

- change Frame interface: use ParticleDescription insteat of single template parameter
- delete ::getName() from method list and move it as template parameter to ParticleDescription
Do not try to link HDF5 static

The problem here is more cumbersome. some libraries like libdl are
also included by MPI and would be linked once static once dynamic.
upgrading MPI to static binding is to intrusive so we stay with libSplash
static only and everything else "default".
Add FindPNGwriter Module

... and use it in all CMake Projects
Close https://github.com/ax3l/pngwriter/issues/8
change comments/ fix comment typo
Add Comments About the Disabled HDF5
PNGwriter changes very seldom: shared linking

Compared to libSplash, PNGwriter changes very seldom
so that is a good case for shared linking in our
projects to reduce complexity (of double linked
shared/static libraries) with other modules.
Merge pull request #307 from ax3l/fix-SplashCMakeHDF5

Do not try to link HDF5 static
move SuperCellSize to ParticleDescription

SuperCellSize is a needed type of Frame in PMacc thus we must be shure that it is avalible in every Frame type.

- move SuperCellSize from user type (ElectronsMethods and IonMethods) to PMacc
- solve all dependencies
Merge pull request #308 from ax3l/topic-FindPNGwriter

FindPNGwriter Module and GOL ICC
add documentation for ReplaceValueTypeSeq