[fix]Qiu&Zekai: remove node-inspector grunt task

node-inspector grunt task will make the watch task
fail, not sure what's going on there. If you want 
to use it, please install `npm install -g node-inspector`.
[fix]Qiu&Zekai: fix liverload bug

because we did not open 35729 port from vagrant so 
that liverload server is not accessible from outside.
Merge pull request #8 from twers/fix-grunt-tasks

Fix grunt tasks