Added storage object
If the addon is run the very first time, a help page gets shown and the
storage object gets initialized. Version number is saved into storage
object, so when an update has been installed this can be recognized and a
page with release informations gets displayed. This seperation (betwenn
showing first run ever info and release info must be done by a dispatcher
script (for example written in PHP)). The videos (their URLs) will also be
saved into the storage object - not for sniffing, just for counting the
downloads across the different mediatheks. There is now possibility to
export or access this stats.
Hotfix of two minor mistakes
Just by commiting the code I noticed, that when a new release is run the
first time the release-variable in the storage object doesn't get updated.
Also there was the mistake that release was set to "1.1" (due to testing
reason) - it should be "1.0" at the moment.