[recipe request] FARM and pre-reqs

[hartb]

Please add FARM: https://github.com/deepset-ai/FARM

There's currently no conda-forge recipe for FARM, it expects to install several pre-reqs using pip. I was able to substitute in conda packages for many of those reqs using the Anaconda, WML CE, and Supplementary channels (didn't have the presence of mind to include conda-forge).

In case it helps anyone else, I was able to get FARM to build against WML CE 1.6.2 PyTorch with:

#!/bin/bash -i

set -e

# Update conda config to include WML CE production and Supplmentary channels
conda config --prepend channels https://public.dhe.ibm.com/ibmdl/export/pub/software/server/ibm-ai/conda/
conda config --append channels powerai

# Install and activate WML CE 1.6.2 PyTorch environment
export IBM_POWERAI_LICENSE_ACCEPT=yes
conda create -y -n FARM python=3.6 pytorch powerai-release=1.6.2
conda activate FARM

# Install as many FARM requisites as possible from conda
conda install -y alembic boto3 "configparser>=0.3.5" entrypoints flask \
    flask-cors "gitdb2>=2.0.0" "gitpython>=2.1.0" gunicorn jsonschema \
    "keras>=2.2.4" mako pandas "pyrsistent>=0.14.0" "python-editor>=0.3" regex \
    requests scikit-learn scipy sentencepiece setuptools simplejson \
    "smmap2>=2.0.0" sqlalchemy sqlparse tqdm "websocket-client>=0.32.0" wheel

# Install other FARM requisites using pip
pip install transformers==2.1.1
pip install flask-restplus
pip install dotmap==1.3.0
pip install seqeval
pip install mlflow==1.0.0

# Clone and install latest FARM
git clone https://github.com/deepset-ai/FARM.git
cd FARM
pip install -e .

exit 0