Document analysis for shape adjustments
Add acceptance test for shape-adjustments
Bring doc/conf.py up to PEP8
Implement adjustments property on _Shape

* add _AdjustmentCollection class to pptx.shapes
Tweak implementation of _Table bool prop setters
Implement first-pass adjustments loader
Add ISO/IEC spec documentation and schemas
Add gen_spec to generate spec data structures
Factor msoAutoShapeType constants into own class

* Factor msoAutoShapeType enumeration constants out of MSO into distinct
  class MSO_AUTO_SHAPE_TYPE, standard abbreviation 'MAST'
* Rename references to 'MSO.SHAPE_' to 'MAST.'
Remove 'desc' attribute from msoAutoShapeType

* Remove 'desc' item from pptx.spec.autoshape_types
* Remove 'desc' attribute from _AutoShapeType class
* Remove 'desc' references from tests
Add adjustment values to pptx.spec.autoshape_types
_AdjustmentCollection() loads default adj vals
_AdjustmentCollection() loads adj val actuals
_AdjustmentCollection feature complete
Release v0.2.5