[INTERNAL] Fragments in XML Template Views

Verify:
/testsuite/explored.html#/sample/sap.ui.core.sample.ViewTemplate.scenario/preview
shows icons based on sap:semantics (for Identification fields of
Contact)

PS1: PP HMÜ, PKS
PS2: (Draft) error handling on cycles in fragments, comments, clean-up
PS3: error handling, TODOs, rebase, comments from TCH
PS4: add parts missing for PS3 due to forgotten local commit
PS5: comments TCH

Change-Id: I0877988d7e293299ef4d65555f0ddb23c0a8d645
JIRA: FLPUISERVICES2014-1087
Merge "[INTERNAL] Fragments in XML Template Views"