updating readme for fielddb api dir which contains the common js codebase
sending audio video recorder's parent to be the current datum
upload audio and down load textgrid runs in commonjs
adding audio localhost urls for serving audio files
exposign audiovidoes to callers
fixes #949 audio upload now generates textgrids

which the user can see and download (done via the importer lib)
using fielddb audioVideo collection to manage audio videos
jshint
handling indian timezone (30 min diff) results in hh:m not hh:mm