Latest preview release targeting .NET Core RC2

Includes readme+package.json changes.

RC 2 release candidate #9

Merge pull request #326 from DustinCampbell/fix-omnisharp-download

No longer download OmniSharp from GitHub releases

RC2 release candidate #8

Removed version suffix

RC2 release candidate #7

.NET Core RC2 release.

RC2 release candidate for 5/13

Release candidate with latest version of OmniSharp.

RC2 Release Candidate for 4/29

Release candidate using CoreCLR/FX build rc2-24027.

See http://aka.ms/vscclrdogfood for instructions

RC2 release candidate for 4/25

Release candidate using CoreCLR/FX build rc2-24022.

See http://aka.ms/vscclrdogfood for instructions

RC2 release candidate for 4/15 #2

Another RC of an RC 😄

RC2 release candidate for 4/15

Merge pull request #188 from DustinCampbell/update-omnisharp

Update with latest OmniSharp and pick correct version for current Linux distribution

RC2 release candidate for 4/8

Merge pull request #163 from gregg-miskelly/UpdateCoreCLRVer

Update CoreCLR to rc2-24008