add appropriate gitignore for TinyOS git repos
update release notes for proposed 2.1.2.1
Update instructions for repo use

o move README to README.tinyos
o create repo README.md
o add Getting_Started and Using_the_Repo
tweak owners list a bit
licences/bsd: bump year and tweak a touch
Recommend github use instead of requiring it
Reference the coding standard TEP3
Add warning about non-fast-forward pushes
Merge pull request #2 from vlahan/transition

Recommend github use instead of requiring it
Merge pull request #1 from carlsondc/transition

Add warning about non-fast-forward pushes
Update doc/policy/owners.txt
Merge pull request #3 from gnawali/patch-1

Update doc/policy/owners.txt