BumbleBee version 2

Corresponds to Hoepelman's master thesis.

Adds "Change to SUM or SUMIF refactoring" (Op to aggregate, aggregate to conditional aggregate), Extract Formula, Inline Formula, Group References and Introduce Cell Name.

Requires Office 2010+, tested on Office 2010, 2013 (mostly 2013).

Transformation rules are broken in fringe cases because of the new underlying grammar.