I initially planned to get this working on Ubuntu 12, but decided it wasn't
worth it and switched to Ubuntu 14 (Trusty). Now it passes tests on Travis, so
I've added other people's emails back to the set of people to send emails to.
Also update mps while we're at it.
* adds support for `--psol-from-source` so you don't need binary modules, and `--devel` so you can run our tests without going and getting all our dependencies
* adds submodules for testing: mod_pagespeed, ngx_cache_purge etc
* adds support for running as:
```
git clone git@github.com:pagespeed/ngx_pagespeed.git
cd ngx_pagespeed/
git checkout <branch>
scripts/build_ngx_pagespeed.sh [options]
```
* depends on the scripts @hillsp is working on so that we can just check out mod_pagespeed and ask it to build and rebuild itself
* adds colors to output to make it easier to read
Right now run_tests.sh assumes it has 8053 and 9991 without causing any
problems. Start assuming we have 8050 and 8051 as well instead of
requiring people to pass them in.
Jeff Kaufman