Saving worksheet mapping + new spreadsheet model
Merge branch 'master' of https://github.com/KWARC/Sally

Conflicts:
	sally_app/session.log
	sally_spreadsheet/iui-model.rdf
	sally_spreadsheet/iui-model.rdf.64
	sally_spreadsheet/src/test/java/info/kwarc/sissi/model/document/spreadsheet/IUIPaperData.java
Git testing
Author reset
JUnits added
Getting correct cell relations
Remerge with master
Merge pull request #1 from cliguda/master

Saving worksheet mapping + new spreadsheet model (start)