Add Squirrel.Windows 0.4.92
Create the first hack at an installer spec
Create a task which builds an installer
Add create-installer to default tasks
How embarassing
Let's not create an installer unless asked, it takes foreeeeevvvverr
Merge remote-tracking branch 'origin/master' into squirrel-installer

Conflicts:
	build/Gruntfile.coffee
Populate atom.nuspec with the current Atom version
Sign the installer too
Use ERB templates from Underscore-Plus
CI version numbers are Magical(tm)
Organize DisplayBufferMarker into sections. Add docs from Marker
Add DisplayBufferMarker::getInvalidationStrategy
Deprecate s|getAttributes for s|getProperties
DisplayBufferMarker::matchesAttributes -> ::matchesProperties
Shore up the docs around marker creation and invalidation
Rename DisplayBufferMarker -> Marker

Gnar!! :sunglasses:
Move buffer-display-marker -> marker
Upgrade text-buffer to have a private marker
Fix reference to display-buffer-marker