now with PHP7 support and better exception names
We bumped the major version because this release is not fully backwards compatible.
- We decided to change some names to be less redundant.
- All exceptions have been renamed. If you check or throw arc exceptions, please see the new names.
Also we're now testing PHP 5.6 and PHP 7 only.
The remaining ARC libraries will be bumped to 2.0 as well, many have backwards incompatible changes as well.