Required exceptions are now handled in database migration. Updated alembic version

Changed exceptions. Updated alembic version
update to remove rope as a dev dep
Merge pull request #458 from sammyshj/updatemigration

A different kind of exception was being raised, which caused the errors. Any kind of exceptions are now handled.
Also, alembic version has been updated to 0.6.5
Updated SQLAlchemy requirements
Merge pull request #462 from sammyshj/updaterequirements
Update hacking for proper rebase technique.
Required exceptions are now handled in database migration. Updated alembic version

Changed exceptions. Updated alembic version
Database migration to support private bookmarks

Exisitng bookmarks should be public

Added specific exception

Updated SQLAlchemy requirements

Tests added for private bookmark support

Fixed lint errors

Fixed another lint error

Added all tests
Merge pull request #461 from sammyshj/databasemigration

Exisitng bookmarks should be public