only have one config section
better default for mario config path
fix use of non-existent env var
Revert "fix use of non-existent env var"

This reverts commit 1f8250565cff6859f0834e2a8dd100f1969894b1.
Merge remote-tracking branch 'origin/master' into bad-var

Conflicts:
	configs.js.EXAMPLE
	mailreader.js
Merge pull request #6 from 18F/bad-var

configuration simplification