update .travis.yml to use astropy-wheels
don't install wheels for egg_info case (closes #948)
typo fix in install steps
use wheels build on 12.04-64 server
changed to all wheels all built with 12.04
added .travis.pip.wheel and switched .travis.yml to use it
clean up travis.yml tab alignment
clean up .travis.yml
removed open file detection
Move some stuff around/add comments in travis stuff
Switch to new wheel location at mpia
Merge pull request #1029 from eteq/use-wheels

Change travis to use wheel binaries