"logan init" didn't work -- fix README install instructions

[HYan-lei]

Hi, I run the following command, and got the "bash: logan: command not found" wrong message. Does Logan work now? Thanks.

sinteractive --mem=2g --cpus-per-task=2 --gres=lscratch:200
module load ccbrpipeliner
logan init

[kelly-sovacool]

Hi @HYan-lei, LOGAN is not yet available in ccbrpipeliner, as it is still in development. We are currently targeting LOGAN to be released with ccbrpipeliner/8.

Our apologies that the README has incorrect information, we will fix this.

[kelly-sovacool]

@dnousome These are the offending lines of the readme that need changed:

LOGAN/README.md

Lines 22 to 29 in b799370

	LOGAN is installed on the Biowulf in the ccbrpipeliner module.
	Please clone this repository to your local filesystem using the following command:
	```bash
	# start an interactive node
	sinteractive --mem=2g --cpus-per-task=2 --gres=lscratch:200
	# load the ccbrpipeliener module
	module load ccbrpipeliner
	```

We could also add a disclaimer/warning toward the top of the readme:

🚧 **This project is under active development. It is not yet ready for production use.** 🚧