Add template for the Launchrock landing page
- Add beta_signup app
- Add template with LR widget
- Add beta_signup to INSTALLED_APPS
- Add route
- Add LAUNCHROCK_KEY to local settings template
- Add LR key support to dotcloud postinstall
Fixed port number typo in README.md

There was a spot that the port was listed as 8000, but should have been 8001.
Added PostgreSQL to requirements

Build fails by default if PostgreSQL isn't installed.

Error seen on a fresh-ish build of Ubuntu 12.04:

`
Error: pg_config executable not found.
Please add the directory containing pg_config to the PATH
or specify the full executable path with the option:
python setup.py build_ext --pg-config /path/to/pg_config build ...
or with the pg_config option in 'setup.cfg'.
`

and (if missing dev libraries)

`
Error: You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.
`
Merge pull request #3 from plusjeff/patch-1

Added PostgreSQL to requirements
Merge pull request #2 from plusjeff/master

Fixed a port number typo in doc/README.md
Add db backup script for Dotcloud and documentation
Add item to make backup script executable
Add a password change form to the manager
Specifically set the input type to text for field name, type, and other.
Do not display any part of place submission if it is being filtered out.
Add the root URL for dataset to the manager
Moved the visible property from Place to SubmittedThing; updated tests.
Filter submissions by the visiblity property, only returning visible submissions by default
Filter Submission Activity by the visible property
Merge branch 'master' of github.com:openplans/shareabouts-api
Show all submissions (not just visible ones) in the manager
Use the API to construct a submission set url
Add length to dataset submissions
Refer to the place id from submission resources
Really add the length to dataset submissions