bumped version number to 1.8.0, and mentioning GCE support in readme
Merge pull request #249 from shatterednirvana/release-1.8.0

bumped version number to 1.8.0, and mentioning GCE support in readme
Checking if jar versions are supported
Merge pull request #250 from jovanchohan/sdk_version_check

Checking if jar versions are supported