Add possibility to remember/forget Harvest credentials.
Add daily check to harvest plugin
`daily harvest` command now takes a username as an argument.
Some minor corrections
Add command for starting timers.
Add a command to stop tracking.
Add a facility to stop the first running timer found.

As you usually only have one timer running, this is a handy
shortcut for stopping the latest timer you started.
Add a check that HUBOT_HARVEST_SUBDOMAIN is set.
More informative response to start of tracking.
Add a command to list the available project-task combinations.
Code deduplication
More Unicode
Improve documentation
Hubot-friendly documentation.

Hubot parses the documentation comments and gets heavily confused
on multiline descriptions.
Fix indentation
Try/catch blocks for catching connection errors
Periodically check if Harvest available. Also add a command to trigger this manually.
Update harvest plugin to allow storing the userdata in the Redis brain.

Previously storing the HarvestAccount object in the Redis brain caused
its methods to be lost.
Add a possibility to query the entries of a specific day.
Correct grammar issue