cache only the contents of the "change language" modal (fixes #140,
closes #136)
vary the main menu cache by base URL (fixes #139)
fix incorrect French translation (fixes #142)
sort by "sorttitle" only when retrieving movies (fixes #144)
fetch title when retrieving recently added episodes (fixes #141)
general improvements to the layout on smaller devices (particularly
mobile screens). Fixes #143.
add ability to specify the MAC address of a backend
add a getCurrent() helper to BackendController
add a subnet mask column to the backend table (needed for wake on LAN
in some configurations)
add tomnomnom/phpwol to dependencies
implement wake on LAN support when a backend is configured with a MAC
address.
updated translations (currently missing the new strings)
don't check backend connectivity when on the login screen
ignore backend connectivity check when switching backends, otherwise
the WOL functionality won't be triggered eventually
decrease the timeout when checking backend connectivity to 1.5 seconds