feat(JAZZ_core): Adds isString method to isms
feat(JAZZ_core): Adds isNumber method to isms
feat(vars_color): Adds hex string signature, and setColorByHex
feat(vars_color): Adds setColorBy... methods
feat(vars_color): Adds support for scope as a supplied property (__scope)
fix(vars_color): Fixes issue where all vars instances shared the same scope on JAZZVar prototype