A little housekeeping
 - add a .gitignore
 - pin down the SBT version.
Mandate UTF-8 as file.encoding.

A better fix would avoid use of the platform default encoding
altogether.

Also adds a meta directive the the generated HTML to set the
encoding to UTF-8. We assume that the page that this is embedded
into follows the same conventions, either with a meta tag or with
a HTTP header.
Release notes for 2.11.0-M3

 - Correct Scala IDE section, after input from @dragos.
 - Improved the bug reporting section
 - Use the range v2.11.0-M1-v2.11.0-M3

Generated the commit list from the merge base of master and 2.10.x
and the soon-to-be-tagged 01dec25425@scala/scala.
Incorporate review feedback

  - Scala IDE is releasing for Indigo.
  - Link to external contributors' profiles
  - Markdownoes
Make mention of two known bugs in this milestone.
Merge pull request #17 from retronym/topic/2.11.0-M3

2.11.0-M3