- 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

- changed tessellation flatness test which produces less vertices
(especially when using straight lines)
- added nvgDebugDumpPathCache which allows to dump path cache state to
stout

Merged NVGcolor, which implements the color as floats, colors can be > 1.0, allowing HDR rendering when needed.

Currently working with gl3buf backend.

Variable initialization, unused var removal, and casts.

- changed tessellation threshold from 0.3 to 0.25
- fixed scissor AA on retina
- fixed stroke AA on retina

Removed some unused variables to silence compiler warnings, initialized
variables to 0, added varialbe casts to silence additional compiler
warnings.

- merged font stash optional FreeType support

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

fixed error return value

- added better logic for inner bevels
- tweaks to reduce overdraw at edges
- fixed convex shape logic

reduces warnings

Reset pixel storage settings after load texture.

Improve VC support

Remaining change for VC support

- Renamed FPScounter to PerfGraph
- dump avg times at exit

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

Support for cases where the gl header does not include GL_ARB_TIMER_QUERY

Quick guard against NULL ptr dereference of texture type on CPU side

Timing for CPU inner frame and GPU inner frame added