Added library and region to lending stats.
Added lending stats 0.1
fixed error in rendering subjects secion in lending stats.
Taking stats_solr setting from config file.
Ignore errors and continue processing other records.
Added library pages.
Optimized process_stat script.

Made it fast by using the archive.org database instead of metadata API.
storing just the part of the library url and lowercase region in solr.
region pages are linked now.
Fixed a bug in accessing collections from ia db.
Remove None values before adding to solr.
Added box_url to Vagrantfile
Added IA collection pages.
send updates to solr in batches.

The update function collects the docs to be updated and the flush
function sends them to the solr server. The docs will be auto flushed if
the number of pending updates is > 100.

This seems to have improved the solr update time considerably.
temp fix to process_stats.py
Added subject pages in lending stats.
Fetching all solr facets in a single solr query.
Fixed bug in displaying #loans graph.
Removed absolute path /vagrant from Makefile.
Merge branch 'master' of github.com:internetarchive/openlibrary