Remove #perform method;

- Yard: Update method documentation.
Handle lack of self-signed certificates better.
Minor README update.
Move simplecov configuration to .simplecov file.
Remove mode from logger.
Better handling of failure;

- Write responses out to tmp/ directory.
- Report failed request/response in the log file.
- Add Troo.trace method to check what is being called.
Remove unnecessary instance variable.
Remove unnecessary return.
Be funny.
Continued work on handling failure.
Make the log file pretty.
Remove TODO section because GitHub Issues.
Remove Decorators::Member.
Yard: Update method documentation, also;

Whitespace changes.
Remove 'config/trello_api'.

Move configuration into app itself to save a file access.
Fix writing of responses to file system.

Remove .configuration_path and .log_path; use .root_path instead.
Add `troo wizard` to help users configure Troo.
Use back ticks when explaining commands.
Fix minor wizard bugs.
Minor refactoring.