First merge to Sitrus2015 from Sitrus

#### Purpose

Make Sitrus2015 actual. Branch Sitrus2015 is analog of Revit2015 with Dynamo Library UI project changes.

#### Modifications

Automatic merge & conflicts resolving.

#### Additional references

[MAGN-5312](http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-5312).

#### Reviewers

@Benglin, please take a look.