Merge pull request #9 from mcls/master

Refactor act_on_all_archival_associations
Add Marten Claes to contributors after awesome refactoring work
make the inspiration list look correct again
remove some unnecessary stuff from gitignore
fix the examples in the readme and add a section about the readonly options
kick rvm out
add a bunch of schema stuff to my fixture models so it's easier to know at a glance what can be done with them
fix commentary on ambiguous table test
update to properly reflect bugfix in changelog from last release
name test class correctly
refactor some basic tests around archiving so they test only one thing
add some more assertions for deep nesting test so we know archive numbers are propagating
fix example ruby for readonly stuff
fix some formatting in tests
ignore sqlite files
add testing of sqlite, mysql, and postgres all together
update changelog and readme as well as making it so the schema doesn't load all the tables into all three dbs
add steps for creating a pg db for testing and re-work the documentation for interacting with AAA models
clarify some text in the readme
switch example code order slightly