Version 1.3.0

Add core functions:

• iToX(): Extract the X-coordinate from a linear position.
• iToY(): Extract the Y-coordinate from a linear position.

Refactor operators:

• distributeGrid(): Use the functions converting linear to 2D coordinates.
• repeatGrid(): Use the functions converting linear to 2D coordinates.

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Pull requests:

• Feature/linear to 2 d coordinates by @jsconan in #103
• Release 1.3.0 by @jsconan in #104

Full Changelog: v1.2.0...v1.3.0