Endpointer config updates

Small updates to model loading

Fixes in lattice construction
Transcriber with a server

Transcriber tool and model autodownload API

Add support for incremental decoding and partial lattices

Wrap exceptions on C++ size and raise them properly
Fbank support
Improved rescoring accuracy

Fixed RNNLM rescoring strategy, good with en-us-0.21 model.

Make word times optional. API change unfortunately.

RNNLM rescoring for big models

Different fixes for DLL loading