adding support for cardinality attribute
refactoring HALE serializer to support complex objects and arrays
removed unnecessary code
added documentation for cardinality attribute

Refactoring some mis-alignments in documentation.
added documentation for cardinality attribute

complex item example
addressing PR comments
Merge branch 'fixing_hale_serializer' of github.com:mdsol/crichton into fixing_hale_serializer
addressed comments in detail.rb
refactoring get_control method
Merge pull request #236 from mdsol/fixing_hale_serializer

Fixing hale serializer - Merging