Added OCR capabilites

docs/TODO

@@ -14,10 +14,13 @@
 * Database storage backend (sql, nosql: [mongodb])                     - DEFERRED, provided by https://bitbucket.org/david/django-storages/wiki/Home
 * Staging file previews                                                - DONE
 * Display file size in list and details                                - DONE
+* Document previews                                                    - DONE
+* Document previews on demand w/ imagemagick                           - DONE
+* Add document description                                             - DONE
+* Integrate with http://code.google.com/p/pytesser/                    - DEFERRED, done using Popen
 * Document list filtering by metadata
 * Filterform date filtering widget
 * Validate GET data before saving file
-* Integrate with http://code.google.com/p/pytesser/
 * Update symlinks when document or metadata changed                    - ALMOST
 * Check duplicated files using checksum
 * If theres only one document type on db skip step 1 of wizard
@@ -27,14 +30,12 @@
 * Encrypting storage backend
 * Indicate in generic list which document don't exist in storage backend
 * Add css grids
-* Document previews
 * Recognize multi-page documents
 * Document model's delete method might not get called when deleting in bulk
     from a queryset
 * Allow metadata entry form to mix required and non required metadata
 * Link to delete and recreate all document links
 * MuliThreading deferred OCR
-* Document previews on demand w/ imagemagick
 * Versioning support
 * Generic document anotations using layer overlays
 * Permissions
@@ -43,3 +44,5 @@
 * Scheduled maintenance (cleanup, deferred OCR's)
 * Show document metadata in document list
 * Show abbreviated uuid in document list
+* Add tags to documents
+* Field for document language or autodetect