Revised elements/structure page
Remove final keyword from RebuildGraphOp class

This fixes an error that prevents the rebuild-graph operation from being
run.
Copyediting most of the repo section
Merge branch 'master' of github.com:boundlessgeo/GeoGit
Merge branch 'master' of github.com:boundlessgeo/GeoGit
Merge pull request #480 from scooterw/master

Remove final keyword from RebuildGraphOp class
improve logging set up to survive multiple command executions

This patch improves geogit cli logging set up to properly resolve
the logging file and current dir upon multiple command executions
and makes geogit-console batch mode (runFile()) to set up logging too,
and also avoids code duplication in cli exception handling between
cli and console.
adding geogit_docs theme
Merge branch 'master' of https://github.com/boundlessgeo/GeoGit
Updating theme links
Remove unneeded SQlite dependency. Fixes #483
small revisions to man page formatting and revised geogit_docs style
Merge branch 'master' of https://github.com/boundlessgeo/GeoGit
Revising manual title and adding workflow diagram that was missing
Adding directory for images/ to manual for docs
Merge branch 'master' of github.com:boundlessgeo/GeoGit
improved merging of geometries
Adding offcanvas menu for repsonsive pages for docs
Moving js to bottom and adding jquery migrate script
Fixing docs css for retina