Copy splash.h without PostInstall

- preparation for package based installs
- reduce dependencies
- feature: print version that is going to be compiled
Fix install include path

- by default relative to install path
Fix Version Path to new include/splash
Examples: include splash/splash.h
Commands are all CAPS right now
Merge pull request #79 from ax3l/topic/noPostInstall

Remove post-install script in CMake