Support other rotation angles.
Small rotation fixes.
Changelog for #455
use getElementsByTagNameNS for namespaced DZI xml when getElementsByTagName fails
check length instead of undefined for DisplayRect nodes tagname ns fallback
correct typo in fallback ns logic for pulling display rect nodes
Proper viewport bounds changes for rotation.
Merge branch 'master' into free-hand-rotation
Increase viewport bounds slightly for rotation.
always use getElementsByTagNameNS since it will work for DZI xml with or without ns prefix
Replace error for non right-angle rotations in Rect.rotate.
Implements pinch rotate.
Merge pull request #465 from rlskoeser/ns-aware

Support dzi xml with namespaces in Firefox
Merge branch 'master' of github.com:openseadragon/openseadragon
Fix code style issue.
Added pinchRotate option.
Fixes doc comment.
Merge pull request #466 from PathXL/free-hand-rotation

Allow all rotation angles
Merge pull request #468 from PathXL/rotate-pinch

Implements pinch rotate.
Changelog for #466 and #468