README.md linkified to celebrate we have C++ < C# 

According to the GitHub language stats bar (the colored banner above the code at https://GitHub.com/cefsharp/CefSharp) we recently tipped the scales into being a C# project.
README.md now mentions MinimalExample
Update README.md

Nits and a broken link, gaah...
Set the stage to pack and push 31.0.0-pre1 CefSharp NuGet for #137

- Bump version series from 3.<something> to the new 31.0.0-pre1. Note with this we don't even have a clash with unofficial version id's pushed to staging.nuget.org :-)
- Change `cef.redist` dependency version indicator to allow auto-update or install of latest & greatest in the 3.1650.1562 series
Let's add a <licenseUrl> to packages
Cefsharp.Common.targets: cleanup and don't hijack AfterBuild
Stay < col 132
Update CONTRIBUTING.md

+ 'with' in the last bullet point 
Minor spelling nit
Merge pull request #325 from jornh/README-patch

README.md patch to celebrate we have C# > C++
Merge pull request #323 from jornh/patch-1

CONTRIBUTING.md clarification
Split stuff which should have been on separate lines from the start
CONTRIBUTING.md - please no #Regions
Merge pull request #314 from jornh/prepare-to-pack-31.0.0-pre1

For #137: Set the stage to pack and push 31.0.0-pre1 CefSharp NuGets
@jornh, you missed this one. :)
Fixed copyright to indicate that we are now on the 2014 side of things.
...and also refer to just "the CefSharp Authors", since the CefSharp Project is not really a legal entity in its own.
Apparently, I missed some files in my earlier commits. Bummer!
There is no spoon, yet...
Let's upgrade this one while we're at it.
Update README.md

Undo one tiny bit of global search/replace