Style updates and recipe-driven attrs

* Move Postgresql attribute overrides to recipes
* Switch attribute names to use symbols and s/wal-e/wal_e
* Remove Sensu attributes
Fix accidental symbol in runit_service declaration
Remove unused wal_e data attribute
[0.2.0] Bump minor version level to reflect attribute name change
[1.0.0] Better description, remove runit version pin; previous changes non-BC
Merge pull request #8 from SimpleFinance/no-more-hyphens

No more hyphens