Converted adeptsense to editing for apidoc

Since 7.3 adeptsense has been deprecated and expunged, the new format
is by using the textadept.editing method. Anyway, here's a quick fix
to help your vi implementation work with >=7.3 versions of textadept.
Merge pull request #4 from abaez/adeptsense-deprecation

Converted adeptsense to editing for apidoc