Merge branch 'master' into refactor

Add a 5.0 preview invitation (#212)

Rename the preview to a beta

Fix ReadMe typo

Test stable ST version (#194)

Merge pull request #165 from michaelblyons/sublime-syntax

Rewrite syntax definition in YAML

Exclude development assets from package files

Add execution policy to sublime-build

[EditorSyntax] switch to the better grammar!!

Grammar is copied from commit 8ec9066
https://github.com/PowerShell/EditorSyntax/blob/8ec90660044b1729d9724d83c37fec5d40d16186/PowerShellSyntax.tmLanguage

Merge pull request #135 from SublimeText/dev

Dev