Rename Orientation to DeviceOrientation. Apple iPhone already implements Orientation to mean "screen orientation"
Add diagrams to clarify the rotations.
Update start.png
Merge branch 'master' into gh-pages
Merge pull request #1 from richtr/gh-pages

Minor editorial updates
Merge pull request #2 from richtr/gh-pages

Add project README.md
Fix angle ranges in the spec.

To avoid ambiguity the angle range intervals should be open on one side.
Also removed some unnecessary words to simplify the sentence.
Merge pull request #3 from timvolodine/gh-pages

Fix angle ranges in the spec.
Add additional worked examples for converting Tait-Bryan deviceorientation data to Rotation Matrixes and Quaternion formats (+ add JS code examples of usage).
Improve MathML output formatting
Add consistency checks to provided Rotation Matrix and Quaternion representations
Update rotation matrix nomenclature to avoid conflict with R rotation vector defined elsewhere in spec
Update rotation matrix nomenclature in img alt attributes
Update quaternion nomenclature in spec
Update rotation vector and rotation matrix notation in spec examples
Return degrees instead of radians in compassHeading() JavaScript function example
Return a 3x3 matrix (instead of a 4x4 matrix) as per the formula provided in the spec in the example getRotationMatrix() JavaScript function example
Re-phrase the 'Alternate device orientations' introduction to be more clear.
Remove consistency check of deriving original Tait-Bryan angles directly from the rotation matrix as we already have the compass heading example doing a consistency check
Remove un-used commented sections from the spec
Remove intermediate rotation vector derivation functions as surplus to explanation