Local modules and other changes

Administrator utilities
Improved media viewer
Enhanced "On this day" module
Changes log enhancement
Provide unified before/after display of changes
Shared notes shifted style from inline to css and added styles for
shared notes to all themes
reinstated custom js module - deleted module in error
Utility module fix bug that removed leading \ character in path
Utility module improve content of email message by using
WT_Mail::auditFooter
Implemented sitemaps
Added custom 404 file
Utility module bug fix - translations not working in cli mode
Utility module

Simplified code now requires php 5.3 or greater. CLI files must take the
name of the module (by default 'utility').  Consequently, it's not
necessary to pass the module name as a parameter to the utility class
constructor. Provided rudimentary validation of parameters and updated
help text to reflect that fact.