AICC/CMI-5_Spec_Current — pull request #27 by cawerkenthin (2013-04-11 16:33:07+00:00)
Title: Begin section 9.2, plus some minor edits

Per the last meeting, made a suggested start on Section 9.2, Activity types. Primarily to change the "optional" activity type in XAPI to mandatory in CMI5.