Add a const string field for the If-None-Match HTTP header
Merge remote-tracking branch 'upstream/master'
Merge pull request #270 from aaronlerch/master

Add If-None-Match HTTP header string
Update src/ServiceStack.FluentValidation.Mvc3/Mvc/ExecuteServiceStackFiltersAttribute.cs
Merge pull request #271 from glikoz/patch-4

Update src/ServiceStack.FluentValidation.Mvc3/Mvc/ExecuteServiceStackFil...
tweak built-in Request/Response filter attributes to include allowed usages
INCR SS.MVC to v3.9.19
Change Request Filter attributes to allow inheritance
Merge remote branch 'origin/HEAD'

Conflicts:
	src/ServiceStack.ServiceInterface/AuthenticateAttribute.cs
Added Contribtor 105: @allenarthurgay (Allen Gay) - Welcome!
Added Contributor 106: @vansha (Ivan Korneliuk) - Welcome!
Added Contributor 107: @aaronlerch (Aaron Lerch) - Welcome!
Added Contributor 108: @glikoz - Welcome!
Added Contributor 109: @danielcrenna (Daniel Crenna) - Welcome!
Added Contributor 110: @stevegraygh (Steve Graygh) - Welcome!
Added Contributor 111: @jrmitch120 (Jeff Mitchell) - Welcome!
Added Contributor 112: @manuelnelson (Manuel Nelson) - Welcome!
Fixed Android build
Merge pull request #273 from JonCanning/master

Fixed Android build
- added whitespace normalizing