Rename buffergeometry_drawcalls example to _drawrange

[fernandojsg]

This has been bothering me for a while, as I don't remember why I named the example with drawcalls instead of drawrange as the example is about the later not about draw calls :)

[WestLangley]

I don't remember why I named the example with drawcalls

We used to use the terminology "draw calls".

[mrdoob]

Shouldn't this PR also remove the webgl_buffergeometry_drawcalls.html file?

[fernandojsg]

I don't remember why I named the example with drawcalls

We used to use the terminology "draw calls".

@WestLangley ok! thanks for clarifying that makes sense :)

Shouldn't this PR also remove the webgl_buffergeometry_drawcalls.html file?

@mrdoob yeah, fixed, I forgot to add the change on the rename so it appeared just as new file instead of renaming :)

[mrdoob]

Thanks!