LDEV-1352: Added properties and the IMSLD conditions that use the properties, to selectively hide/show the branches. Updated the LAMS schema file and removed some activity attributes that don't need to be in the export.
LDEV-1352: Adding branching to IMSLD export. The branch activities are now exported, along with the branch mappings, conditions and groupings in a structured format. Still problems with ordering of the activities within a branch, there aren't any conditions to control the branches and the groups don't line up with IMS LD groups.