Add loading page

[illseption]

• Added loading page to main website
• Added jQuery code to base.html for running loader animation
• Added loader animation class to base.css Fixes #79

[illseption]

Made some changes I think. Please review.

[divyam3897]

@illseption I see no changes.

[illseption]

Made some changes. Overview:

• Changed loader time from 500 to 1200
• Changed .rect names

[illseption]

Changes:

• Changed loader time from 1200 to 2500
• Squashed commits

[divyam3897]

It has been merged, thank you.