This adds `ImageDrawCircleLines()` and `ImageDrawCircleLinesV()` to draw outlines of circles, and updates `ImageDrawCircle()` draw a filled circle to match the effect of `DrawCircle()` and `DrawCircleLines()`.

Some functions/values have been deprecated for long time but some mapping was kept for convenience. Some of those mappings have been removed...

* Fixing typecast warnings generated by visual studio 2019 in examples.

* Changes to fixes based on feedback

Co-authored-by: Jeffery Myers <JefMyers@blizzard.com>

* Update ImageDraw*() functions to match arguments of Draw*()

Updated draw functions:
ImageDrawPixel()
ImageDrawPixelV()
ImageDrawCircle()
ImageDrawCircleV()
ImageDrawLine()
ImageDrawLineV()
ImageDrawRectangle()
ImageDrawRectangleV()
ImageDrawRectangleRec()

* [nodepadpp] Update Notepad++ ImageDraw defintions

This updates the Notepad++ definitions with the updated ImageDraw methods.

* [examples] Add ImageDraw calls to textures_image_drawing

* Update ImageDraw*() methods

Changes:

 - Font structure has been redesigned, CharInfo structure contained character rectangle within font texture, it has not much sense, considering that it was an information relative to the font atlas generated and not the character itself, so character rectangles have been moved out from CharInfo to Font.
 - CharInfo included a data parameters to contain character pixel data (usually grayscale), generated on TTF font generation. It was inconsistent with other fonts types, so, now CharInfo includes directly an Image of the glyph.
 - REDESIGNED: GenImageFontAtlas(), additional recs parameter added, loaded and filled inside the function to export atlas characters rectangles, instead of silently modify the input CharInfo data.
 - REVIEWED: ImageTextEx(), funtion retrieved the font atlas image from the GPU, that was slow and problematic in several platforms. Now it uses directly the CharInfo image. Support for unicode codepoints has also been added.
 - REDESIGNED: ImageDraw(), now it includes an additional parameter, the color tint, not only it could be useful for several situations but also function signature is more consistent with similar functions.
 - ADDED: ImageFromImage() to generate a new image from a piece of another image.
 - REVIEWED: GetNextCodepoint(), renamed parameters to be more clear.

Also all examples and games that were affected by those changes have been reviewed.

- Preparing MP3 files support
- Jumped version to raylib 2.0-dev (too many breaking changes...)

Examples have been renamed for coherence with raylib modules and test
examples have been merged into examples folder.

Check CHANGELOG for the list of changes in this release!

View CHANGELOG for details