chore(docs): Now using Sphinx 1.2.2 to build docs
chore(php): convert class underscores to namespaces
Merge pull request #7126 from ewinslow/sphinx-update

chore(docs): Now using Sphinx 1.2.2 to build docs
Merge pull request #7104 from ewinslow/namespaces

chore(php): convert class underscores to namespaces
chore(input): merge `get_input` and `set_input` into `Elgg_Http_Request`

Fixes #7091