Fixes JSLint warnings
Renames get,set,shipping methods to get,set,costs
Fixes some names
Renames shipping to costs on the data base
Merge pull request #319 from nsendetzky/master

Fixes JSLint warnings
Adds setup tasks for renaming shipping to costs
Fixes predependency and execution order
Merge pull request #318 from doleiynyk/2013-10-08_Renaming_shipping_to_costs

Renames shipping to costs in price item and database tables
Fixes renaming shipping to costs in the admin interface
Merge pull request #320 from doleiynyk/2013-10-08_Renaming_shipping_to_costs

Fixes renaming shipping to costs in the admin interface
Filter invalid XML characters in Texts
Update documentation of _mb_ord
Fix typo.
Add full UTF-8 support instead of UTF-16
Verify that $text is UTF-8 encoded
Rename function to make the description more exact.
Fix typo
Code styling
Implements method for calculating dates in the past that keeps care of weekends and public holidays
Merge pull request #323 from nsendetzky/master

Implements method for calculating dates in the past that keeps care of weekends and public holidays