Added TextColored() helper. Changed some parameters to const references (still allows implicit casting)
Added TODO list items from users feedback
Added BeginTooltip()/EndTooltip() helpers to create tooltips with custom widgets
Added storage for up to 5 mouse buttons for convenience (even though ImGui itself only uses 1)
TreeNode/CollapsingHeader ignore clicks when CTRL or SHFIT are held + make default button hover brighter
Slowed down mouse wheel scrolling speed in combo boxes
PlotLines(), PlotHistogram(): added a stride parameter.
Fixed floating-point precision issue making the right-side value of a plot sometimes wrap to the left-side value.
Minor todo/readme changes