Switch to config via a global variable, ala FW/1

[atuttle]

Use structAppend though, instead of individual setting checks!

variables.framework = { ... };

[atuttle]

Any new settings added in the same version (EG #73 will probably have some) will only be possible using this new format.

[atuttle]

Re-opening just to make sure I document this really well.

[atuttle]

In addition to documentation updates; examples should also be updated.

[atuttle]

For documentation: Order of precedence from highest to lowest will be:

1. Anything changed in configureTaffy() (method deprecated but allowed for legacy support)
2. User settings
3. Default settings

[atuttle]

https://github.com/atuttle/Taffy/wiki/List-of-all-variables.framework-settings