updated docs for new rake task for delayed job, and the 0.21 tag for updating and installing
when installing from fresh, we now describe installing with git rather than mercurial
the value of checkbox is posted only if it is checked, by default, it is "on"
destroy_version should be delete method
clear merge note
fix get_filename when downloading
configurable how to show webpage as external link: if enabled, any asset(content blob) registered with url but NO local copy stored on SEEK server will be shown as external link ( SYSMO-1632)
fix failed refactoring variable
attempting to run travis using postgresql
added the postgres gem to the test env
test show_as_external_link_enabled
dropped the obselete binary column data_old from content-blobs

OPSK-18
removed use of the data_old obselete attribute
Shortened some long index names, to be less than 63 chars for postgres - OPSK-18
Dropped old db_files table - OPSK-18
add migration files to git
run unit and functional tests using mysql and postgres
setup the env variables for travis correctly

to create the correct build matrix for different SUITE and DB_TYPE
flipped configs for biovel flavour
rollback migration to put back db_file, as it is needed by attachment_fu, and the forums