Added better handling for unicode in demo's renderer
Made absolute layout rect set `last_rect` in mu_layout_next()
Updated README screenshot for visual changes
Replaced mu_input_mousewheel() with mu_input_scroll()
Updated copyright year: 2018 -> 2019
Removed window resize icon and extra footer spacing
Updated screenshot on README to reflect demo changes
Minor adjustment in background color preview on demo project
Made clip_rect() function more concise
Removed old function prototype from microui.h
Renamed internal MU_HASH_SEED -> HASH_INITIAL
Made MU_COLOR_SCROLLBASE slightly lighter
Removed `last_body` field from mu_Container
Updated demo for body/scrollbar changes
Added support for center-aligned window title text
Changed how body and scrollbars act; made draw_frame use outer border
Added `Custom Controls` section to doc/usage.md
Added `Style Customisation` section to doc/usage.md
Added `Layout System` section to doc/usage.md
Removed window info `hovered` part of demo