Rename construct_block* to construct_xblock*
Minor cosmetic cleanup
Add base class for XBlock mixins
Merge pull request #91 from cpennington/rename-construct-block

Rename construct_block* to construct_xblock*
Give Plugin a mechanism for injecting test-temporary entry points
Remove unused 'default' parameter from FieldData.get
Add a default implementation for `has` to FieldData
Merge pull request #94 from cpennington/xblock-mixin-base

Add base class for XBlock mixins
Merge pull request #93 from cpennington/minor-cleanup

Minor cosmetic cleanup
Merge pull request #95 from edx/ned/give-plugin-a-mechanism-for-injecting-test-temporary-entry-points

Give Plugin a mechanism for injecting test-temporary entry points
Merge pull request #98 from cpennington/add-default-has-implementation

Add a default implementation for `has` to FieldData
Merge pull request #97 from cpennington/remove-default-param-from-get

Remove unused 'default' parameter from FieldData.get