Change source activate hint to Conda activate

[brechtmann]

When creating a Kipoi env it recommends to activate it using source activate (last line)
change that and also in the documentation
to
conda activate

$ kipoi env create BPNet-OSKN
INFO [kipoi.cli.env] Writing environment file: /tmp/kipoi/envfiles/e01763d9
INFO [kipoi.cli.env] Loading model: BPNet-OSKN description
INFO [kipoi.sources] Update /data/nasif12/home_if12/brechtma/.kipoi/models/
Already up-to-date.
INFO [kipoi.cli.env] kipoiseq not installed. Using default kipoiseq dependencies for the dataloader: kipoiseq.dataloaders.SeqIntervalDl
INFO [kipoi.cli.env] Environment name: kipoi-BPNet-OSKN
INFO [kipoi.cli.env] Output env file: /tmp/kipoi/envfiles/e01763d9/kipoi-BPNet-OSKN.yaml
INFO [kipoi.cli.env] Done writing the environment file!
INFO [kipoi.cli.env] Creating conda env from file: /tmp/kipoi/envfiles/e01763d9/kipoi-BPNet-OSKN.yaml
INFO [kipoi.cli.env] Done!

Activate the environment via:
source activate kipoi-BPNet-OSKN

[Hoeze]

@zahoorz Could you please fix that?