changed directory structure in .tools
added icon for wordpress plugin directory
use htmlentities in settings textarea fields
added unicode support in truncate function
include auto feature for truncate

With the new option "auto" for the truncate length the truncate will be done automatically
via css.
Small widget changes

* Changed width of truncate text fields due to auto option
* some whitespace fixes before and after text fields
fixed / changed widget tooltips
added general information in widget form
updated screenshots
preparation for version 0.6.7
Merge branch 'develop'