Updated and improved scripts to semi-automate  prepare the build enviroment and build Trillek

 Added a basic bash scripts for Ubuntu 14.04 that should allow to setup and build Trillek. At least should help to see what is needed to build Trillek for anyone that try it for first time

* **prebuild.sh** Try to install and/or compile all necessary libs. In some case,s try to detect previously if some lib is pre-installed on the system (GLFW 3 , Bullet with double precision, GTest and RapidJSON).
* **build.sh** Executes cmake and try to compile Trillek