Added picrust conf.
Merge pull request #43 from jrrideout/picrust

Added picrust conf.
Uncommented make -j4 flags.

I think this is a reasonable default to have, as the R and Infernal targets are already using -j4. This will help speed up the nightly Clout tests.
Merge pull request #44 from jrrideout/make_flags

Uncommented make -j4 flags.