Add support for environment variables#14

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gf-atebbe wants to merge 3 commits intoethanrowe:releasefrom

gf-atebbe:release

Commits on Jan 12, 2016

Support environment variables in bootstrap
gf-atebbe
committed

Commits on Jan 13, 2016

Fixing unit test for python 2.6
gf-atebbe
committed

Commits on Mar 9, 2016

Adding more unit tests to address concerns raised in the PR
gf-atebbe
committed