improve bing search tests
[Hotfix] Fix regimes are not displayed in root collection
fix review issues from a-chumagin
Merge pull request #962 from alex-zen/hotfix-regimes

[Hotfix] Fix regimes are not displayed in root collection
Add Skydrive image scaling.

Details:
1. Add Skyrive image scaling.
2. Fixed bug when skydrive mediatype was dublicated in content item authoring form.
3. Fixed Skydrive XSS vulnerability.
Merge branch 'skydrive-image' of git://github.com/alex-zen/ChronoZoom into alex-zen-skydrive-image
Merge pull request #967 from a-chumagin/ImproveBingSearchTests

Improve bing search tests
Minor update of authoring error messages