Accloudtant

Fixed
- Fixes relocation of AWS prices web.
- Fixes bug when loading region scoped RIs.

Fixed
- Supports instances without `Name` tag.
- Included `requirements.txt` for setup with `pip`.

Improved
- `match_reserved_instance` has been slightly improved.
- Commands' descriptions has been added to help message.
- The set of instances and reserved instances to walk have been reduced to `running` and `active`, correspondingly.
- Reserved instances are now represented with a specific `ReservedInstance` class.
- Instances linkage to reserved instances has been setup.

Fixed
- Handles exception when no default AWS credential is found.
- Some code and style fixes that should be added to 0.1.1.

Added
- Get and list current AWS EC2 computing costs with `accloudtant list`
- Get report on current AWS EC2 instances, current, and new with `accloudtant report`