added VoltDB cache driver, refactor
update
Update .travis.yml
Update .travis.yml
Update .travis.yml
Update .travis.yml
Update .travis.yml
add coveralls.yml
Merge branch 'develop' of https://github.com/ytake/Laravel.VoltDB into develop

Conflicts:
	.travis.yml
update readme.md
Merge pull request #3 from ytake/develop

upgrade (added cache driver)