simplify elapsed time formatting and add elapsed_format and show_elapsed_seconds options
remove global gitignore notice from .gitignore
use simplecov instead of rcov (fixes "bundle install")
ignore Gemfile.lock (it should not be in a gem's source code)
fix "rake install" for tracking! :D
delete old Rakefile (obsolete)
use a .csv extension for the data file (instead of .txt)
fix #51 (weird stuff happens when multiple tasks are entered) :D
fix #45 (List.remove goes boom)
add center align to CLI.pad
get right column to resize based on elapsed time format (fix #52)
rename "description" to "task" in table header
fix #54 and fix #59
bin/tracking can now be run directly, without requiring that tracking is installed as a gem
default :task_width to 40
Remove unneeded stuff from the readme and update parts of it
Add tutorial to readme
Tweak help text
Add usage information (tracking --help) to readme
Readme: Use $ for prompt in Tutorial section