Added support for retrieving item history using the `catalog` subcommand.
set verbose cookie, so `ia catalog --verbose` outputs detailed information.
added verbose option for when retrieving item history.
Verify all uploads by default calculating an md5 checksum for each file and setting a "Content-MD5" header. If the value of this header does not match the checksum calculated by S3, a 400 error is returned and no tasks are submitted to the IA catalog. This option can be turned of by setting the `verify` option in `upload()` to False.
Verify all uploads by default calculating an md5 checksum for each file and setting a "Content-MD5" header. If the value of this header does not match the checksum calculated by S3, a 400 error is returned and no tasks are submitted to the IA catalog. This option can be turned of by setting the `verify` option in `upload()` to False.
v0.5.1
Merge branch 'master' of github.com:jjjake/ia-wrapper into refactor

Conflicts:
	internetarchive/api.py
	internetarchive/catalog.py
	internetarchive/item.py