Update README.md

Minor spelling errors.
Merge pull request #1 from AmyStephen/patch-2

Update README.md
Adding support for view environments
Updating composer file for packagist.
Updating README.md
fixing composer info
Updating README with the actual roadmap
Adding support for multiple connections.
Increasing test coverage.
Adding simple phpunit.xml.dist for easier development
Updating composer.json
Requiring stable version of ext/couchbase
Updating Codebase to work with the ext/couchbase 1.1.0 release
Updating Readme for 0.2
Updating README.
Removing version to make it work with composer
fixes spelling error in exception message
Depend on 1.1.2 because of important fixes
Bringing the library up to par with 1.1.2 and decreasing the risk of failing tests by the same keys.
Updating README, correcting examples.