Merge pull request #24 from raphaelm/master

Update with latest commits from raphaelm
Create StringProvider and Strings classes for internationalization
purposes
Use the new StringProvider in a first example
Merge branch 'master' of https://github.com/johan12345/opacclient.git
StringProvider as interface
Add Strings to StringProvider for all possible error messages inside the
APIs
Update JSoup (fixes a bug found while implementing reservations in
Henstedt-Ulzburg)
Recognize additional error message when reserving media in iOPAC
Merge pull request #245 from johan12345/master

Bugfixes for iOPAC and first steps towards translatable strings