release #2

Fixes and features:

• config file syntax is now easier to override or extend using the new constructor arg: config_file_parser (via merged PR #28 - thanks @lahwaacz )
• support for python 2.6 (via merged PR #18 - thanks @kuba )
• replace dashes with underscores in env. var names when using the auto-env-var feature (via merged PR #29 - thanks @helgi )

first good release

0.9.3

minor edits