CB-6178 Plugman does not cache downloaded plugins

close #70
added basic support for doc/index.md
CB-6280: plugman publish now publishes doc/index.md
Fix spelling typos

github close #64
Remove trailing spaces in all js files

So that everyone can use auto removal of trailing spaces without generating
unwanted diff lines. Only white space changes, nothing else.

The command used:
sed -i '' 's/[[:space:]]*$//g' **/*.js
fixing empty merges
Merge branch 'master' into browserify