Feature/registry

These changes allow for more detailed information about the registry to be displayed in the web gui. It does not differentiate between key addition and modification and so treats all writes the same. Writes have green text and are prefixed with 'w+', deletions have red text and are prefixed with '-'. An example is below:

![stry](https://cloud.githubusercontent.com/assets/5605916/5071798/34f6f7a0-6e42-11e4-98bc-e12ae1aa2113.png)