[Bugfix] Bug #434, #436.

Details:
1. Bug #434. Authoring: User is able to create exhibit Cosmos outside.
2. Bug #436. Authoring: Missing Exhibit time range check (or correction).
Merge pull request #508 from alex-zen/bugfix434

[Bugfix] Bug #434, #436.
Updated API reference documentation.

Reset build options to not build XML (default).
Merge and final polishing
Merge pull request #523 from alterm4nn/NewUIFormFix

UI improvements: header forms
Merge pull request #522 from willum070/docs

Updated API reference documentation.
Final improvements