Add color2hex and number2hex global functions
Call color2hex function where needed
Replace number2word() with a more scalable function
Clean up color functions a bit and return shorthand hexcodes when possible.
Update color function not to use hexadecimal shorthand.
Update README.md with changes and SASS precision hint.
Merge branch 'hexadecimal-colors' into develop

Conflicts:
	scss/ink/_functions.scss
Update sample output