add optional color over-rides set in environment variables
use || for all the tests
add resets after each word so that over-ridden background colors don't bleed all over the place
add bold to each word so that it is not un-set by the multiple resets
Add documentation for style customization options
moved preposition_color into position with corresponding preposition
wrap .bash_prompt in backticks for readability
quote SOME substitutions in bash
prefix the locally scoped styles with prompt_ for consistency with the global overrides
expand environment tests to long-form control structures
used simple example of style overrides provided by twolfson
Added screenshot for color override
Removed unnecssary braces around `prompt_user_color`
Adjusting list to personal style
Updating prompt to match the screenshot
Added image reference to color override
Documenting prompt variables further
Adding variable examples
Playing with list again
Fixing trailing parenthesis