Revert "update vimlint.sh" (#39)

This reverts commit eb0cea43f0acf9f5db4a712316fab216f37bb172.
Revert "Overhaul of bin/vimlint.sh.  Fix .travis.yml." (#39)

This reverts commit 4aa008c23ef414f923b2adf2b86532fab2c7662d.
fix #39: add rtp+=`pwd`
fixed typo: #34