added wav parsing, with SpeechRecognition

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
added .wav test file

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
force python2 compat versions only

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
added improved wav test file

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
added wav test case to testing script

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
adde wav file support to index

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
added contribution to changelog

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
changed default audio extraction text
lessens ambiguity

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
added testing info to docstring
for future reference

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
added standardized text test for wav

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
created wav testcase

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
added raw_text test files

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
added flac package to system requirements

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
Merge pull request #56 from arvindch/audio-extraction

Added Audio file extraction for .wav files
minor documentation reshuffling after merging #56