- nvgTextBreakLines: wordMinX was relative to rowStartX, which caused
problems when rowStartX change on line break, but wordMinX was still
relative to the previous rowStartX
- fixed font size on perf graphs
- made demo to use row minx/maxx instead of row->width
- fixed demo hover distance

This commit fixes the demo’s font sizes for the changes in #558, which makes the rendered font size matches what you saw on other native apps. The demo used bigger font sizes than they actually were. This commit deduces the font sizes to match the original demo’s look.

This commit fixes the formats as suggested in #299 and fixes stack overflow when using `freetype` backend.

- API changed!
- moved image repeat from nvgImagePattern() into image creation
nvgCreateImage*()
- made flip-y and premultiplied common image flags (not just GL)
- removed nvglImageFlags(), flags passed in via
nvglCreateImageFromHandle() flags
- nvgluCreateFramebuffer takes image flags as param

- added function to allow to combine scissor rects using intersection

- added typedefs for all structs
- fixed some compiler warnings

Tweaked premake to remove some windows warnings.

- Added alpha for images
- Added global alpha

- fixed copy/paste bug in bevel calculations

- line caps did not consider AA width

- added test for multiple stroke widths
- allow stroke width down to 1px size, then scale with alpha
- fixed textBoxBounds() in hi-dpi

- nvgTextBounds() API changed, assumes x,y as input too
- fixed nvgTextBounds() return values
- added nvgTextBoxBounds()
- text line width is handle more consistently
- added note about return values of text measure funds
- changed demo to show text(box)bounds usage

- calculate all text related stuff using scaling
- removed a couple of compiler warnings
- tweaked caret picking

- fixed some warnings
- changed nvgLetterSpacing() to nvgTextLetterSpacing()
- added nvgTextBox()
- added nvgTextLineHeight()
- added some documentation

- added debug configs for the lib
- added more data for font stash text iterator (ptr to current and next
position in string, code point)
- renamed nvgVertMetrics() to nvgTextMetrics()
- added nvgTextGlyphPositions() which returns glyph x position for the
text
- added nvgTextBreakLines breaks a text into multiple rows based on
newlines and max row width
- tweaked tessellation tolerance

Currently working with gl3buf backend.

- added support to take screen shots
- added support to render to frame buffer using premultiplied alpha
- fixed spelling NVGaling -> NVGalign

- moved performance counter and drawing to separate file
- tweaks to performance drawing

Needs names for the UI components to distinguish them, and probably stacking vertically for easier comparison.

- removed assize from the back-end api
- moved image to paint in renderTriangles call

- fixed off-by-one pixels from demo
- added device-pixel-ratio support (retina support)
- added nvgEndFrame()

- added milliseconds to fps counter
- smooth fps reading a bit more
- changed GL3 to uber shader

- moved demo stuff to separate file
- created two separate examples for gl2 and gl3
- initial stab at OGL 3.2 core profile back-end (currently twice as
slows as 2.0)
- API change: glBeginFrame() takes view witdth and height as input
- added FPS counter to demo

- updated font stash
- added end parameter to text (can draw substring)
- text and text measure return advance/width

- fixed arc rendering for small arcs
- added color wheel to example
- added screenshot