[draft] Release notes for 0.2

[avh4]

This is a draft of the release notes for 0.2-alpha which will be announced on elm-dev when published.

After a lot of tedious work making the AST retain comments, elm-format-0.2-alpha is ready! Most notable is the switch to 2-space indentation, as was previously discussed on elm-dev. There are also now plugins for LightTable, Emacs, and Vim thanks to @rundis, @Bogdanp, and @ajhager!

You can find the downloads and editor integration instructions here:

• https://github.com/avh4/elm-format
• https://github.com/avh4/elm-format#basic-usage

Here's a brief list of changes:

• changed to 2-space indentation
• comments are handled everywhere they can appear
• fixed a unicode problem with console output on Windows
• parentheses in pattern matches are handled correctly, including a workaround for Qualified names can not be used as type constructor arguments in case statements. elm/compiler#951
• triple double quotes in multiline strings are handled correctly
• more than one file or directory can be given on the command line
• added the --stdin command line option to support IDE plugins

Thanks to the following for helping with the release:

• Noah (@eeue56)
• Martin (@Janiczek)
• Marica (@ento)
• Janis (@jvoigtlaender)
• and to several others who helped improve the documentation

[avh4]

Released as https://github.com/avh4/elm-format/releases/tag/0.2.0-alpha