Bump version to 2.5, update maintainer and URL

https://github.com/behdad/fonttools/issues/140
a VDMX table converter
update table's list through MetaTools/buildTableList.py
Merge pull request #143 from anthrotype/vdmx

A VDMX table converter
[subset] Add looooooooonger usage

Based on text from Adam Twardoch.

Fixes https://github.com/behdad/fonttools/pull/15