Update episodes.html

Added content to episodes.html.

Created nested <ul> for each episode, linked to first part of each
episode on YouTube, listed characters and the cast member that played
them.

Fixed a link in theWorldMeta.html that directed customers to an external
site within the same tab. Link should now open a new tab.
Updated about.html and cast.html

Added introduction paragraph to cast.html and player descriptions.

Added all content for about.html, including form with validation.

TO-DO:
Add dummy submit button to About page
Add date and time to each footer (replace copyright)
Update comments in customer js and css files, update meta elements on
all pages
Merge pull request #4 from escahill/version-2

Version 2