Add support for cascading id and tag name in addition to existing cascading class support
Update unit test and remove log statement
performance improvements to cascade method
Merge pull request #545 from amro/add_general_css_cascading

Add More General Support for Cascading
background-color was being returned as an array. it is now treated properly as a string. i also applied the same fix for shadow.
Merge pull request #548 from amro/fix_bg_color_treated_as_array

Return background-color as a string instead of an array
check for unsigned int overflow
Merge pull request #549 from amro/fix_layout_index_oob

check for unsigned int overflow
Fix crash on encountering empty text block #550
Merge branch 'od/issue_550' into develop
Fixed logic problem in the order of when index is decreased #550
Merge branch 'od/issue_550' into develop
Added programming guide, updated appledoc comments for enums
Added programming guide
Updated podspec
Merge branch 'release-1.6.5'
Added 1.6.5 changelog post link
Fixed syntax error
Merge branch 'release-1.6.5'
Ignore element names that aren't found in the list of known selectors. This speeds up cascade calculation tremendously.