This IActionHandler adds a new Category to current Category calling the
handler with parameters:
'id' - Category id
'name' - Category name in current locale.
This IActionHandler removes a subscription to a Category calling the
handler with parameters:
'categoryPath' - Path to Category that user want to remove his subscriptions
Returns an int[month][weekInMonth][dayOfWeek] array with the day of the
month at position month range is [0..12]=[JANUARY..DECEMBER]
weekInMonth range is [0..5] dayOfWeek range is
[0..6]=[MONDAY/SUNDAY..SUNDAY/SATURDAY] depending on creation parameter
firstDayOfWeek.
This class is responsible for template finding, acording to the following
context inheritance rules:
Project's templates : First look at project/categoryPath .