Merge pull request facebookarchive#942 from yguedidi/prepare_5_6_2

Prepare 5.6.2 release

Fix doc block syntax that interferes with Doctrine

Bump Graph API version to v2.10

* Added support for options with batch requests.

* Bumped Graph API version to v2.9.

Add a MIME type for SRT files

Fix a bug that would throw a type error in `GraphEdge` in some cases

Add check for PHP 7 CSPRNG first to keep mcrypt deprecation messages …

…from appearing in PHP 7.1 (facebookarchive#692)

Fix a bug that does not properly parse response headers when they con…

…tain the colon character

- Bump Graph API version to v2.8.

- Auto-cast `cover` field to `GraphCoverPhoto` and `picture` field to `GraphPicture` in `GraphPage`. (facebookarchive#655)
- Add `getCover()` and `getPicture()` to `GraphPage`. (facebookarchive#655)

Fix bug where polyfills file fails to included properly when using th…

…e built-in auto loader