pjsip: don't compile libmilenage

Ignore-this: 34c33a0840b0f5f5c3b1b218063aa065

darcs-hash:20140317130807-56b4d-07dca6e135da7e1d04eb72153dce94db52146410
Ensure MediaStreamDidEnd is always posted for MSRP streams

Ignore-this: f98df94a751eaea43fbb5a09abff02a5

darcs-hash:20140317155933-56b4d-c8268689b99bd2762ab479c57ececa73a8524145
Removed unneeded exception handling

Ignore-this: 1c23bdb309dc567aa16984662a601a3e

GreenletExit inherits from BaseException now

darcs-hash:20140317160903-56b4d-f109e3502ada71b42817b92f07408627117e13b5