moved math require from vector test to web::vector
removed #transformation from display interface test
display docs minor clarification
display interface test added transform methods
cleaned up display tests
display tests for #translate and #scale, cleaned up display tests
Display #stroke_curve, #stroke_curve2
cleaned up Display fill/stroke method docs
fixed Web::Display#stroke_curve2
asset interface test
keyboard interface test
mouse interface test
vector interface test #stroke_curve[2]
ticker interface test
display test order matches docs order
removed Display#transformation from docs
removed test for abstract asset class
removed display tests for command methods with indirect side effects
Display#clear test
Display#stroke_line test