Fixed what Keys managedCefBrowserAdapter send

Problem: Not all input-keys was sent to handled in Javascript, especially keycombinations like Strg + X, Strg + V and so on wasn't handled. Now, with the fix, this is no longer a problem. Also the keys, special handled in the original version, are no longer needed and so i removed them.
Startpage "about:blank" removed

Problem: The Back-Button doesn't work on the right way, because the with about-blank he's activated (like you can press the button) but doesn't load anything, because about:blank isn't a real site. So the running-statusbar always running, but no progress is visible. Also there was the possibility, that the real Url never loaded. Don't know how these works together, but with an empty startpage, this problem is gone.
Removed special key-combination strg+shift, only used for own project
CefRenderProcess process creates too many channels (and does not close them)
expose SendMouseWheelEvent
Merge pull request #590 from Octopus-ITSM/jsbindings_tooManyChannels

CefRenderProcess process creates too many channels and does not close them
Merge branch 'expose_SendMouseWheel' of https://github.com/Octopus-ITSM/CefSharp
Add SendMouseWheelEvent to WPF Control
Add SendMouseWheelEvent to IWebBrowser with xml comment
Merge branch 'master' of https://github.com/g3st3/CefSharp
Revert fix for #522
Example of user land fix for #522
Manually apply changes suggested https://github.com/numbersint/CefSharp/commit/6c5972651b71daa94ca9a6db3ab7086c32463089

Allows for implementation of the following Gist for headless (service/console) rendering
https://gist.github.com/jankurianski/44b6e2b86e1b137a9ffd
Attempt to get appveyor using our build script
Manually merge https://github.com/jornh/CefSharp/commit/93f164741a831dc3585101da9c4a3513cd6eaca3
Change nuget temp path as $env:LOCALAPPDATA causes a problem for appveyor
Only build for `VS2012` now that we're using build.ps1 for appveyor
Remove test_script - disabled in appveyor web admin
Disable tests in appveyor.yml
Check if APPVEYOR_BUILD_VERSION set and use that as nupkg version
Tweak $env path
Attempt myget deployment