Add "None" to draw-features example's select

This allows to deactivate drawing entirely in the example.
Correct minor typo in tasks/readme
Stop exporting getTransformFromProjections and transformWithProjections
Merge pull request #2212 from elemoine/drawinteraction

Add "None" to draw-features example's select
Merge pull request #2213 from probins/patch-1

Correct minor typo in tasks/readme
Correct code type in tasks/readme
Merge pull request #2215 from fredj/json-type

Correct code type in tasks/readme
Merge pull request #2214 from probins/patch-2

Stop exporting getTransformFromProjections and transformWithProjections