Changes to imageCropper, supports new mediafilesystem
Proves dictionary repository fails to get when weird 0 languageid dictionary item exists.
Proves LanguageRepository lines 37-38 to be useless, but probably intended
Language repo now returns null for non-existing ids, making Get_WhenIdDoesntExist_ReturnsNull pass.
DictionaryRepository now excludes translations with missing language. Should've committed a test to prove that TabsAndPropertiesResolver.TranslateTab uncommented fails, but can't find a nice existing fixture, so just debugging to see if it works now.
More or less fixes content localization. Must do more tests and fix create dialog. Only tested manually on my box.
Changed TabsAndPropertyResolver's translation mechanism to use CultureDictionaryFactory. Also added translation to ContentTypeController.GetAllowedChildren. Localization "complete" and working for content editing.
Forgot document type on general properties  tab
Implemented spectrum for picking colors for the color picker pre-value editor and added broader bgColor directive
Prevent NullReferenceException

The variable val was not referenced later in the function and caused a
NullReferenceException.
Fix U4-4119 - Export Fails for Generic Properties

Adds null checking for PropertyGroupID on export so that properties with
no group (tab) don't throw an exception.
PackageService: Fixes Single import for DataTypes

Importing a file with a single data type failed, because the DataType
element is at the root when exported.
Merge remote-tracking branch 'upstream/7.0.2' into 7.0.2
Fix MySql dictionary issue

Conflicts:
	src/umbraco.cms/businesslogic/language/Item.cs
ImageCropper helpers WIP
Updating nuget targets files, like on v7. Also updates nuget author name.
Bump version to RC
Update readme and remove non-functioning backups from install.ps1
Updating minimum required versions of dependencies to be the same as v7.
U4-4447: Make image properties populate when uploading from ImageCropper