Reverting SetValue change on CreateContent

Move the content.SetValue out of the if (propertyType == null) call - as
this causes inherited values not to be saved.
U4-5520: Localize datepicker
add moment.js
styling tweaks for new datepicker
forgot to update the datepicker format string in a couple of places
remove minified version
reference non-minified files
add cursor: pointer to datepicker button
Update format string for date picker without time
Fix for width percentage on template selection not being rendered in grid property editor
Should fix the build for real now. Sets GenerateSerializationAssemblies to Off which then doesn't produce umbraco.XmlSerializers.dll any more.

Should be safe as this is only used for updatechecker and packageinstaller. From:  http://hashtagfail.com/post/5255977780/sgen-loaderexceptions-error - "Visual Studio attempts to generate a serialization assembly containing the types in your solution, to improve XmlSerializer serialization performance, should you choose to serialize your types."
Fixes VS14 build. SqlCEHelper.cs - the compiler in Vs14 doesn't like that we're callng `public IRecordsReader ExecuteReader(string commandText, params IParameter[] parameters)` like this: `ExecuteNonQuery("alter table [" + table + "] drop constraint [" + constraint + "]");`

Added two internal method overloads that just send an empty parameter array instead.
Ok, the loader styles should now be good for everything!
Merge pull request #504 from arknu/datetimepicker-locale

U4-5520: Localize date/time picker
renames to GetModelAsync
adds note
Moves fix for VS14 to the SqlCEHelper class itself, InternalsVisibleTo didn't seem to work in VS (worked on command line build though)
Rename "refrech" to "refresh in the canvas designer methods
Highlight item on left panel when hover in the canvas designer item
Fix incorrect icons to show hide categories on canvas designer main panel