Merge pull request #1 from gvwilson/master

Importing documents for the Software Carpentry Board.
Merge pull request #2 from gvwilson/master

Updating mission statement
Job description for Executive Director
Job description for Board Chair
Final wording of mission statement (to be voted on by email by Nov 6, 2014)
Issue escalation guidelines
Resolution on pursuit of funding
Merge branch 'master' of github.com:swcarpentry/board