Change info command print title

Previously: Always printed description as "Description: {description}"

Now: Title as task name when using info command, and use previous
behavior for task switching.
Add aliases for arguments

Now parsing:
  'c' for clear
  'i' for info
  'rm' for delete (seriously considering just changing the long commad
  name to remove)
Add colorized output

Output is set to color code 0 by default (just regular white text) but
allows for some elements of the output to be colored according to
ANSI color codes.
Add text coloring on remaining printouts.

Everything that wasn't covered in one of the original categories
is now just controlled by TEXT_COLOR
Update code comments in day.rb

Made the user configuration section slightly more verbose, changed
purpose slightly.
Fix cosmetic spacing issue in code.
Fix tiny typo in readme
Update error messages for verbosity and clarity.

Updated all error messages except a couple which are slated for
deletion.
Tried to make them more clear and less like arcane programmer jargony
bullshit.
Also tried to use a style of directly addressing the user but avoiding
and reference to the program as a personification.
Extended list of enabled-day glyphs

Updated the huge case statement handling day-glyph parsing.
It literally handles every single possible partial-spelling of a day to
handle for any abbreviation.
It would be nice to look at some kind of an internationalization
solution in the future though.
Update version to 1.7

Updated changelog and version number in day.rb and readme.md