doc: Added new title image
doc: Imported flask template

from https://github.com/mitsuhiko/flask-sphinx-themes
doc: Removed sphinx-quickstart comment
doc: Adjusted link colors
doc: Moved GeoAlchemy logo from index file into config
doc: Added font variables to stylesheet
doc: Changed fonts to OpenSans and BreeSerif

Load via Google Webfonts or fall back to Verdana and Georgia
doc: Added border-radius to code samples
doc: Fixed typo
doc: Moved title image into _static folder
doc: Added title image to latex/pdf output
doc: Don't show "Show Source" links in HTML output
doc: Added small logo to sidebar

.. on non-index pages
doc: Decreased "Indices and tables" headline level
doc: Added "About" and "Useful Links" sections to index sidebar
Merge pull request #26 from Turbo87/travis

TravisCI: Use "CREATE EXTENSION" to install PostGIS 2.x
Merge pull request #23 from Turbo87/docs-styling

Improved docs styling
Fix typo
Add Tobias to the contributors list
Update RELEASE.rst (rtd)