Set various variables for easier customization

Address and more social media names can now be set in the config file,
date at bottom of site is set automatically.
Colors can now be set in config file.

Had to move the css files containing the colors to the /_includes
directory to put variables in them.
Cleaned up some things.

More parameters can be set from config file.
Removed some content from the config file

Reverts of my earlier changes, content should not be stored in
configuration.
Some corrections
Merge pull request #1 from st4ple/master

Extended configurability for colors, etc