update .rvmrc to .ruby-version and .ruby-gemset files

this seems to be the preferable way to do things, and I like it more
than the .rvmrc file
scrap bootstrap

I was just using bootstrap before because joe had the basics already
working. now that it's so far out of date it doesn't make sense to me
try and update it.
update jQuery

1.6.4 is a wee bit old.
more bootstrap scrapping