Updated reference to md-addins
[TextEditor] Improved text editor loading performance.
See assistly case #73863. During open a very long line could block the
file open performance noticable long. Now a best guess of the line
length is done & the longest line is determined during line creation.
That should speed up loading by a large margin. OTOH it only works
100% on monospaced fonts, but on non monospaced fonts the editor width
is adjusted during scrolling and it's a fair guess for the initial
horizontal size.
Updated newtonsoft.json
Fixed 'Bug 20253 - Error during code completion of
System.Globalization.CultureInfo.'.
Fixed 'Bug 20234 - Expand Selection command selects whole conditional
blocks instead of expressions'.
Fix shared projects compat issue with VS

Don't create or save build configurations for shared projects.
Don't add the location prefix to the DependentUpon property of files.

Fixes bug #20257 - Some shared projects created by XS can't be opened in VS.
Fix crash when cleaning project

It happens when cleaning a project that it has an incorrect configuration
mapping.

Fixes bug #20145 - On building Xamarin.Forms Shared solution, it displays
"Clean failed. Object reference not set to an instance of an object" in XS
status bar

Fixes bug #20251 - Xamarin 3: Unable to clean with 2 solutions loaded
Updated reference to md-addins
[Icons] [MonoDevelop.Ide] Fixing bad icon references
[Icons] [MonoDevelop.Ide] Removing obsolete stock icon overrides (md-gutter-error and md-gutter-warning)
Update README.md

Describe some common user problems that most users will have when trying to compile monodevelop on their own.
Updated reference to md-addins
Revert F# bump since it broke the build
Fixed 'Bug 19908 - [Forms] Autocomplete doesn't work for the Children property of Forms layouts'
Fixed 'Bug 20110 - [Forms] Autocomplete doesn't work for the Placeholder property'
[XmlEditor] Aware of Shared project and is able to switch between projects in breadcrumb bar
[TypeSystemService] Fixed bug that did not check buildActions of /MonoDevelop/TypeSystem/Parser
Bump nrefactory.
[XmlEditor] Checking IdeApp.Workspace != null before accessing it in UpdateOwnerProjects
[XmlEditor] Listening to FileAddedToProject/FileRemovedFromProject and updating OwnerProjects
Fixed 'Bug 20293 - At assembly browser clicking 'Base Types' folder
shows error 'System.Reflection.TargetInvocationException'"
Updated reference to md-addins