Add .gitignore.
Remove unused code
Update TODO
Simplify tasklist template
Add comments, documentation
Ignore .meteor package
Remove empty file, add .gitkeep to server/ dir
Rename constant to UPPER_CASE.
Move Remove-task-handler to Task View.
Meteor 0.6.0 compatibility fix

- `var` definitions are no longer globally available.
  Collections and Models should be declared without `var` statement.
Rename event handler methods
Label; Add Task -> Add New Task.