Start doing v2 documentation

Rename Argument::sumCost to Argument::cost since Argument should not …

remove inferencer and Inference from __All__, since infer is sufficen…

expose build_dict in imikolov dataset, fix bug that len(word_dict) is…

remove ITrainer interface since parameters for train is already getti…

change argument name of data_type.integer_value/integer_value_sequenc…

remove inferencer and Inference from __All__, since infer is sufficent, they are implementation detail.

rename inferencer.py to inference.py

cost is Argument, but argument does not have to be cost.

Use the sequence_conv_pool define inside the networks.py

Redirect code coverage output into /dev/null

* Change build process to generate v2 documentation
* Add directory for v2 api
* Correct sphinx index soft-link

v2 api for seqToseq(machine translation)

Disable test_ProtoServer on Travis CI

dataset: print download progress

fix merge conflict

add sentiment data package

I use pre-commit check all file and report is the passed.
But it is not passed in Travis, so I update __init__.py

mnist api v2

Fit_a_line v2 api

Add testing cost.