[Feature] Basis for MediaPickers.
one more commit for exhib placement
Merge pull request #898 from MichaelKalygin/media-picker-basis

[Feature] Basis for MediaPickers.
bf for 878
Merge branch 'master' of https://github.com/alterm4nn/ChronoZoom into bugfix_878
fix Axis should display:each small tick in one year
Merge pull request #918 from GiorgiyLutidze/bugfix744_2

Exhib placement vertical restrictions
BugFix #862
Able to close Create- and Edit- Exhibit form without warning, losing work on Artifacts
IsModified flag added
ContentItem unsaved data
Merge branch 'bugfix_878' of git://github.com/GiorgiyLutidze/ChronoZoom into GiorgiyLutidze-bugfix_878
BugFix #799 Time series menu list is not aligned
Merge pull request #923 from yuzhay/trivial_fixes

BugFix #799 Time series menu list is not aligned
New artifact form close
Merge branch 'master' of https://github.com/alterm4nn/ChronoZoom
[Doc] Added guide for Media Pickers.
added new tests for bibliography)

added delete exhebit by api
Merge pull request #931 from a-chumagin/b3

added new tests for bibliography)
[Feature] Media List control is integrated with Bing Search mediapicker.
[Feature] Bing search API.

Details:
1. Created sample page where Bing search results displayed (images, videos, documents - only pdf).
2. Replaced Bing search response types with default types from BingSearchContainer.cs
[Feature] Bing Search mediapicker implemented.
Merge branch 'master' of https://github.com/alterm4nn/ChronoZoom