Propose a fix to the bug leading to PICARDPATH env variable being ignored

[andersgs]

Hello.

I fixed a bug where the PICARDPATH environmental variable was being ignored, which lead to no index being produced in a new DB.

For consistency with PHEnix, I changed the variable PICARDPATH to PICARD_JAR and updated the README to reflect that.

I also corrected some minor typos in the README.

To reflect the changes, I suggested a minor version number bump to 1.0.1. I changed that in the VERSION file and in the README.

Cheers.

Anders.

[andersgs]

Ops. I just spotted a typo in my line directing the user to set a PICARD_JAR environmental file in the README.

Currently, it reads:
Set *PICARD_JAR* - full path to the GATK Java archive.

But, perhaps should be:

Set *PICARD_JAR* - full path to the Picard Java archive.

Sorry about that.

[timdallman]

Accepted pull request to remove picard conflict