added sources

Added Haskell Rail compiler from github repository mtolly/rail and C++
Rail interpreter from esolang wiki.
Cpp Infos
Anlage Dateistruktur für das Compiler-Projekt.
Ideenbesprechung vom Team Lexer/Parser/Zwischencode
Branched frontend, Frühversion ast.h von Hanin.
Makefile added
 Hinweise zu Continous Build
Merge branch 'frontend' of https://github.com/ccebinger/SWPSoSe14
Merge https://github.com/ccebinger/SWPSoSe14 into RailTests
added three new test cases