refactoring #28

[onlyphantom]

• Added datetime library to implement feature Make accumulative chart less literal #31
• Drastically cut down (~86 lines of code) the number of computation required in @app.before_request(), which is fantastic news for performance
• Group code based on the "Views-and-Factory" pattern. All global-viz and personal-viz are grouped. Added "factory-style" functions for each page. More modularity is good.
• Rename functions for consistency
• Aesthetic changes
• Other miscellaneous code fixes and improvements

[onlyphantom]

• Added datetime library to implement feature Make accumulative chart less literal #31
• Drastically cut down (~86 lines of code) the number of computation required in @app.before_request(), which is fantastic news for performance
• Group code based on the "Views-and-Factory" pattern. All global-viz and personal-viz are grouped. Added "factory-style" functions for each page. More modularity is good.
• Rename functions for consistency
• Aesthetic changes
• Other miscellaneous code fixes and improvements