Fix Dateformat typo, fix hours casing, add Month-Day-Year formats

[ComputerTinker]

• Fixed a typo: d-M-yyy -> d-M-yyyy
• Fixed the casing on the hours to be correct for two formats. (Hours can be either "HH" or "h", but "H" is invalid.)
• Expanded the list of valid date formats, mostly to add support for Month-Day-Year formats, but also added several new Day-Month-Year formats as well.

Here's the output from my Word document when I tested each of the formats below. (Output is arranged in the order in which the array elements are specified):

8/6/2015
2015-08-06
2015-08
Aug-15
Aug-2015
1:19 PM
1:19:40 PM
13:19
13:19:40
Thursday 6 August 2015
6 August 2015
6-Aug-15
6 Aug. 15
6-8-15
6-8-15 1:19
6-8-15 1:19:40
6-8-15 1:19 PM
6-8-15 1:19:40 PM
6-8-15 13:19
6-8-15 13:19:40
6/8/15
6/8/15 1:19
6/8/15 1:19:40
6/8/15 1:19 PM
6/8/15 1:19:40 PM
6/8/15 13:19
6/8/15 13:19:40
6-8-2015
6-8-2015 1:19
6-8-2015 1:19:40
6-8-2015 1:19 PM
6-8-2015 1:19:40 PM
6-8-2015 13:19
6-8-2015 13:19:40
6/8/2015
6/8/2015 1:19
6/8/2015 1:19:40
6/8/2015 1:19 PM
6/8/2015 1:19:40 PM
6/8/2015 13:19
6/8/2015 13:19:40
Thursday, August 6 2015
August 6 2015
Aug-6-15
Aug. 6 15
8-6-15
8-6-15 1:19
8-6-15 1:19:40
8-6-15 1:19 PM
8-6-15 1:19:40 PM
8-6-15 13:19
8-6-15 13:19:40
8/6/15
8/6/15 1:19
8/6/15 1:19:40
8/6/15 1:19 PM
8/6/15 1:19:40 PM
8/6/15 13:19
8/6/15 13:19:40
8-6-2015
8-6-2015 1:19
8-6-2015 1:19:40
8-6-2015 1:19 PM
8-6-2015 1:19:40 PM
8-6-2015 13:19
8-6-2015 13:19:40
8/6/2015
8/6/2015 1:19
8/6/2015 1:19:40
8/6/2015 1:19 PM
8/6/2015 1:19:40 PM
8/6/2015 13:19
8/6/2015 13:19:40