Added inline documentation
Added documentation
added documentation for a few more classes.
Added documentation
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changed documentation according to doc template
small changes in docs
Added documentation.md and changed inline docs.
Merge branch 'master' into ios-docs

* master:
  Added a purchase token (transactionIdentifier) to the successful purchase event

Conflicts:
	SoomlaiOSStore/EventHandling.h
Added/fixed inline docs and documentation.md
Edited README