* Change: use new settings for handling of read state
* Change: add new setings to the SQL-files for update and installation
* Change: queries for new settings and removal of outdated settings to the update script
* Change: remove outdated setting from the SQL file for installation
* Change: new form elements and language strings for read status handling
* Fix: add a check for non exisiting setting reset_read_state
* Fix: wrong name of setting in the form elements
* Change: ensure a valid value for the read state reset method
* Fix: correct wrong name for form field and hardcoded value
Before issue #11 the value of config_overwrite was false.
To allow overwriting of config items it was changed to true.
That led to bugs with items, that should act as arrays.
* Change: new table mlf2_temp_infos
* Change: add a box to show the version number of the installed version
* Change: load version info only during daily actions
* Change: simplified release info
* Fix: text change in every language except the base language?!
* Fix: remove superfluous and in some cases script breaking query
close#123
