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
test show_as_external_link_enabled
Merge remote-tracking branch 'fairdom/master' into vln-unstable

Conflicts:
	config/initializers/seek_configuration.rb-vln
	config/initializers/seek_testing.rb
	lib/seek/config.rb
add show_as_external_link_enabled to config_setting_attributes
schema with  merging migrations
show as external link only for data registered with url
add forgotten password link to failed login error message(OPSK-24)
limit the input length of login name or password to be 50
also keep hyphen and underscore in pdf contents for search(OPSK-46)
Merge remote-tracking branch 'vln/master' into vln-merging

Conflicts:
	config/routes.rb
	lib/seek/config_setting_attributes.yml
fix to merge error, simulate route accidently removed
openseek