Merge pull request #78 from sharwell/output-window

Output window
Use EditorConfig to assist users working on this project
Fixed indentation settings in project system code (fixes #81)
Merge pull request #84 from sharwell/fix-81

Fix indentation settings
Updated to latest Analysis Service snapshot.
Merge pull request #86 from DanTup/update-analysis-service

Updated to latest Analysis Service snapshot.
Add the [ProvideBindingPath] attribute since the extension includes multiple assemblies (fixes #85)
Merge pull request #88 from sharwell/fix-85

Add the [ProvideBindingPath] attribute
Set Copy Local to True for the output window interfaces assembly so composition errors occur as late as possible
Add helpful error message if output window service cannot be located
Merge pull request #91 from sharwell/improve-error-message

Improve error message if output window service cannot be located
Add top-level options page for DartVS
Add options for Dartium location and Dartium profile location (fixes #83)
Use resources for language display name and installed product registration
Merge pull request #89 from sharwell/fix-83

Add general "DartVS" options page
Added empty DartVS.Common project.

This is to house things that are shared across all projects.
Moved StdIOService to Common.
Removed some DanTup prefixes from assembly info.
Moved some common AssemblyInfo strings to SharedAssemblyInfo.