Add AL_ERROR_INVALID_OPERATION
Misc updates to data.c
Add new AlBlob type for arbitrary binary blobs
Implement AL_VAR_BLOB in aldatashow
Add /Library/Frameworks to framework search path

Xcode 5 seems to have forgotten this path for some reason
Deal with compiler warning
Add vec2_mix() to do linear interpolations
Add atEnd flag pointer to data read functions

Allow readers to try reading items that might not be there
Add flag to model points to indicate on/off curve
Add render support for arbitrary on/off curve sequences
Update ModelViewModel to work with implicit mid-points
Fix bug when removing handles
Change onCurve to curveBias

Allow the implicit on-curve mid-point position to be biased towards or away from off-curve points
Save and load curve biases in a backwards compatible way
Implement path_hit_test() correctly after path changes