Add convinience methods to get the context and output dirs
Add JobSize class that computes the job size
Add admin/size resource
Add validation to size api entry
Add the schema files
Add xmlformat example
Add total element in the jobSizes xml
Add @total to the jobSizes element example
Merge pull request #27 from daisy-consortium/admin_size

Add admin api entry to get the size of the jobs and their total