Merge pull request #7 from raphaelm/master

update with latest commits from raphaelm
Link from account to detail view for iOpac
iOpac: show books which cannot be prolonged any more
This isn't visible from the HTML, so I added an attribute to the JSON
file with the maximum count of prolongings. If that isn't present, it
will not set the KEY_LENT_RENEWABLE attribute.
Lighter ActionBar overflow text color
fixes #204
Merge pull request #205 from johan12345/master

Added new abilities to iOpac