Add MFA support

Format numbers correctly

Use changsets for deployment

Add force flag to deployment
Add formatting and processed/original options to cat
Add force flag to rm
Add watch command
Only show short output for completed resources while watching a stack
Differentiate between objects in diffs that have children with changes and objects that have actually changed
Add two-way option to tree command
Change ls output to YAML format and remove the table library
Add -c switch to check command to display current credentials

Add fmt command and various bugfixes

Bugfixes to improve behaviour of formatting (and hence cfn-format)

Add tree command

Add --long flag to diff.

Improve diff formatting and ordering.
Improve log formatting.

Try harder to load credentials. Add logs command. Add --all flag to l…

…s command.

Update dependencies and display region information when running commands

Fix issue with diffing templates containing different GetAtt styles