Update uploading docs.
Update uploading docs.
Merge branch 'master' of github.com:rajbot/ia-wrapper

Conflicts:
	README.md
Merge pull request #6 from rajbot/master

Add uploading docs.
Updated very out of date requirements.txt
Merge branch 'master' of github.com:jjjake/ia-wrapper
Added required modules.
Only encode values that are type str to utf-8. Use built-in enumerate() rather that i+=1 ...
Use new style string formatting, rather than sprintf style
Reorganized imports. Use ujson instead of json if it is available (ujson is faster).
Added attributes for other default file-level metadata. Removed unnecessary(?) get() function, and replaced with builtin get() function
If file-level metadata is not available for an item, return an empty iterator rather than KeyError in item.files(). Added external_identifier attribute to the File class.
More clean up to the Catalog class. Converted {} to dict() where possible.
Merge branch 'master' of github.com:jjjake/ia-wrapper into experimental
Added Search class
Added Search class