Add package twolame

TwoLAME is an MP2 (MPEG Audio Layer 2) encoder. The library is LGPL.
Website: http://www.twolame.org/

Built via autotools. No special dependencies; libsndfile is only used
for the command-line encoder, not for the library.
Build sox with twolame support
Merge pull request #151 from uklauer/twolame

Add TwoLAME