Polish readme. Usually '.' is not in the PATH
Fix type spec of recon:port_types/0
Update README with changes

Internally bumping to 2.2.1 while developing this fixed version
Merge branch 'lucafavatella-fix-port_types-type-spec'
Bumping travis to include 17.1
Add application modules
Merge pull request #18 from silverbuddy/master

Add application modules
Doc fixes, and travis bump to 17.3
Bump to 2.2.1
Spelling fix in recon_alloc doc
Merge pull request #20 from wmalik/docfix

Spelling fix in recon_alloc doc