CHANGELOG for version 0.13

Bug Fixes:
- Register image w. upload but no metafile [#4864]
- Minor typos and updates in command help messages
- All URL-related params are now URL-encoded [#4986]
- In file list, show all directories as directories [#4987]
- Do not let file-* cmds to create containers [#4992]
- Fix unicode-related bugs in error reporting

Support:
- Adjust project commands to project_API changes [#5025]
- Add dateutils to dependencies
- Rename packages, classes and objects to conform to pep8 standards
- Use the term "project_id" instead of "project" everywhere in kamaki.clients

Features:
- Name and Type filters in endpoint list
- In image register, meta gets same sharing as image [#4960]
- Allow image register to auto-resolve remote path from local file [#4991]
- Merge ClientError and AstakosClientException --> AstakosClientError [#5002]
- Restore kamaki file publish/unpublish
- Accept username or UUID in kamaki file --account/--to-account [#4810]
- History has now a buffer limit [#4479]
- Slice notation in history show
- Datetime support in DateArgument
- Resources can be reassigned to projects
- Update account API commands to reflect changes in synnefo 0.16
- Implement a get_endpoint_url method and use it
- Rename kamaki.clients.Client.base_url --> endpoint_url, keep BW compatibility [#9]
- Remove deprecated --hard argument in "kamaki server reboot"
- Modify upload and download command semantics, to be more intuitive
- Implement more console types (vnc-ws and vnc-wss)

