Merge pull request #1602 from RosettaCommons/kylebarlow/general_dev
BackrubProtocol refactoring and parse_my_tag
* Refactoring BackrubProtocol to not access global option data as it applies
* This allowed me to add a new parse_my_tag option to BackrubProtocol. This BackrubProtocol mover is less complicated to use in Rosetta Scripts, as it represents the composition of movers that makes up the full backrub protocol as it is applied in the command line backrub application.