Rewritten vocabcompiler and separated it from pocketsphinx logic

The pocketsphinx part of vocabcompiler now uses the cmuclmtk wrapper libary for compilation of the languagemodel/dictionary.
A revision check has been implemented, so that vocabulary won't get recompiled if there's no need.
Proper integration into jasper.py, client/stt.py and client/test.py is
still missing due to pending pull requests that change these modules.
Added DummyVocabulary class
Changed vocabcompiler test cases
Add error handler for cmuclmtk import to vocabcompiler
Improve logging in vocabcompiler.py
Fix assert statements in vocabcompiler unittests
Remove UnorderedList from unittests
Use newer cmuclmtk libary version and catch ImportError
Add method to get keyword phrases to vocabcompiler

This way they can be used by other STT engines as well
Integrate new vocabcompiler into jasper.py, client/stt.py and client/musicmode.py
Rewritten G2P code
Minor style fix in phonetisaurus-g2p code
Fix G2P testcases, do not depend on fixed translation string
Remove unneccessary print from g2p.py
Remove unused tempfile from client/g2p.py
PEP8 style fixes in test.py and vocabcompiler.py
Add unittests for G2P without phonetisaurus
Add testcases for (patched) PocketsphinxVocabulary
improve vocabulary unittest coverage
Add test for keyword phrase extraction