search node_modules after normal $PATH

fix tests for node v5

test and implementation for compiling the same directory multiple times

Travis

replace tee/sed/awk with a simple echo loop

test and implementation for more robust output formatting

Replace sed with awk

Cache strict with bower

Update URL for "node_modules checked into source control"

I noticed that
- there is an additional hyphen, and
- www.npmjs.org redirected to docs.npmjs.com
while working on the support ticket #285287

Detect errors