made it work baby
README changed

Changed the README file to include our project's features.
'research' as research-cheat
added mp3 decoder
fixed rocket message
researchPoints depends on population
PopulationCount fixed
Merge branch 'master' of https://github.com/Metha-Gruppe/methapolis-java
rocket research
Merge branch 'master' of https://github.com/Metha-Gruppe/methapolis-java
minor multiplayer changes
Merge branch 'master' of https://github.com/Metha-Gruppe/methapolis-java
works
rocket research
Merge branch 'master' of https://github.com/Metha-Gruppe/methapolis-java
merged with master
Merge branch '19_backgroundMusic'