Patch fixing multiple wrongs

I wanted to use this module in a project of mine, but to have it function fully I needed to fix the following issues:
#157756: * vs. -
#212916: Short tags used in easylists.module and easylists-filter.inc
#181528: No formatting guidelines are provided

Unfortunately, the fixes all sort of depend on each other, therefore I couldn't make 3 different patches.

The attached patch does 3 things:

• Introduces long PHP-tags, for increased compatibility.
• Adds filter tips.
• Introduces a setting on the filter-setting page to choose your own bullet character (defaults to '-').

The patch also trims any space before a line to make sure that an indented list also gets transformed. These indented lists occur when you paste a HTML bullet list into a non-HTML text-area.