Wrapped URL get in a try-catch to provide a proper error message.

Main error case is when the network is down.
Made install.sh executable
Fixed check.py script starcluster -> lmb
half way through de-linting
lmb: passed all pep-8 ant pyflakes tests, see ./test.sh
Merge pull request #6 from lambdal/bug/safeLoadURL

Save URL loading, install.sh, pep-8 & pyflakes