First player no longer draws an extra card
Added `findSystemsOfClass` and `removeSystem` to ECSGame
Added a new Attack style system that accumulates damage
Added system to heal taken damage at end of turn
Added MAX_HEALTH resource to PhrancisGame
Added new game mode where damage is accumulating for each turn
Modified initial life in PhrancisGame to 30
Made it possible to remove systems when game is running
Made it possible to dynamically add systems, fixes #99
Removed "SIMPLE" game mode
Removed @Deprecated on a method in CommandHandler, as it is still useful
Updated version to 0.4
updated travis configuration to release 0.4
Merge branch 'release-0.4' into develop
Updated version to 0.5-SNAPSHOT
added pom.xml.versionsBackup files to gitignore