Merge pull request #33 from nicolaasmatthijs/Hilary

Adding performance testing script
call console.time before console.timeEnd
(IdManagmeent) Write id mappings to separate script file instead of writing back to source content files
(IdManagement) Adding warnings and best-effort for mappings that don't result in generated ids (error?)
Fixing issue with currentBatch being out of context. Not sure how content write-back with ids even worked before..
Merge pull request #34 from mrvisser/Hilary-id-management

Hilary id management
Added a filePost method and special handling for file content types
Added content types and size
Moved path/name to the dataload section of content
Added package.json and bugfix in content dataload
Removed trailing comma
Merge pull request #35 from simong/hilaryContent

Added support for file uploads
Catch and output errors when parsing the response body of content creation.
Fixed memory leak when generating model.
Merge pull request #38 from mrvisser/fix-memory-leak

Fixed memory leak when generating model.
Allow for uploading principal profile pictures
Added support for comments
Switched out cairo for gm
Fixed a bug in the multipart upload
Cleaned up profile pictures
70% of groups should have a picture.
Expanded the JSDoc
Merge pull request #39 from simong/profilepictures

Allow for uploading principal profile pictures