Merge pull request #4 from jugglerchris/master

Fix problem selecting items in textadept-curses
Rename/remove functions changed in Textadept 7
Fix for lfs.dir

Later versions of lfs appear to be more strict about the
second argument.
Add back commented out goto_mark
Update for module name change in Textadept 7.0 beta
Update for API changes in Textadept 7.0 beta 3
More API updates
Update buffer.close to io.close_buffer
Fix typo
Update with Textadept 7 beta 4 changes
Fix buffer_actions example
Fix key binding example in buffer_actions
Minor style change
Update with 7 beta 4 API changes
Change example buffer_actions key binding
Simplify example loading
Fix filteredlist
Remove _M prefix

Textadept 7 does not encourage any prefix for custom, generic modules.
_CHARSET should no longer be necessary in Textadept 7
Fix bug when trying to open in another view