Change style description wording

It looked a little tacky to say we were just copying thoughtbot and that's not particularly true. We have our own ideas and are inspired instead.
Add linter configs to use in projects
Color codes should be six digit and hex
Remove _factory suffix for variable naming

We dont use this anyway and it conflicts with "Avoid object types in names"
Use uppercase for colors

I use uppercase because I think #9A1C52 looks better than #9a1c52. Similar to
typing a word in mIxeD CaSE, I find it hard to read when you switch "case" with
numbers being all "uppercase"
Remove "avoid bang methods" rule

We use this and I think to great effect. Rails uses it and we try to match the
rails philosophy.
Returned `_factory` variable naming

I got confused and thought this was for testing. It's for factory classes.
Just ignore schema file when linting ruby