Setting up workflow for building docs

Signed-off-by: RJ Garcia <ragboyjr@icloud.com>

updating docs-config

Signed-off-by: RJ Garcia <rj@bighead.net>

Merge pull request thephpleague#138 from thephpleague/add_append_feature

Add the ability to append content to sections.

Remove HHVM from Travis testing.

Only because vfsStream does not support HHVM. Plates should work
without issue on HHVM.

Merge pull request thephpleague#78 from elazar/fix/template-render-ex…

…ceptions

Fixed Template->render() exception handling

Clean up new batch functionality in escaping functions.

Merge pull request thephpleague#36 from vensko/master

Default values for sections.

Even further simplification of the URI class.

Fix minor object parameter conflict with PHPUnit.

Fix bug with removing folders.