Compatibility with haskell-src-exts 1.14

[rul]

Hello,

hothasktags no longer compiles with the last version of haskell-src-exts. I've made a patch that solves the compatibility problems, but I didn't prepare a pull request because I wasn't sure about some of my solutions. Here you'll find the patch:

http://anonscm.debian.org/cgi-bin/darcsweb.cgi?r=pkg-haskell/hothasktags;a=plainblob;f=/patches/00-bump-haskell-src-exts-version

Cheers.