Add blinking curser

The : now blinks like a real digital clock
Removing folder
Fix code logic

Cleaning up code logic
(maint) Add blink colon option

Prior to this commit, my blinking colon pull req made blinking default.
This commit makes it so that you have to pass in a flag -B to make the
colons blink. This fits with the style of this program.
More up to date readme

The readme was out of date from what was reflected in the code.
Merge pull request #14 from briancain/master

Adding Blinking Colon
Added utc option
Updated README to add -u
Merge pull request #16 from roaet/add_utc_option

Add utc option
Add the f argument to optparse to avoid segfault.

 Otherwise optarg is set to 0, and we segfault when we
 try to strcpy it.
Merge pull request #17 from paultag/paultag/bugfix/fix-optparse-format

Add the f argument to optparse to avoid segfault.
merged with xorg62's current version