Used parser
Merge branch 'master' into unitTest/sharon
Merge branch 'controller/sharon'
Activated help
fix nullpointer in taskimpl
Activated undo
Merge remote-tracking branch 'origin/logic/wenhao'
Merge remote-tracking branch 'origin/controller/sharon' into logic/wenhao
Fix FIELD_COUNT
Merge remote-tracking branch 'origin/logic/wenhao'
Fixed bug
Merge branch 'master' into logic/wenhao
Add "delete all"
Implemented output for undo
Fix bug with Undo. Issue #61
Merge remote-tracking branch 'origin/ui/victor' into logic/wenhao
Changes in method flow, variable names
Merge branch 'master' into controller/sharon