MAGMA-226: Add javascript methods for geo value types

[ymarcon]

Jira issue originally created by user @ymarcon:

See methods specifications: Geo Magma Javascript.

In addition to the geo specific methods:

• newValue() global method must support the creation of the different geo value types (from strings to be parsed or from array (of array of array) of decimals).
• value() method will return array (of array of array) of decimals.
• eq() method will compare coordinates

This task includes unit tests.

[ymarcon]

Comment created by @ymarcon:

• newValue() supports creation from a geojson string representation of point/linestring/polygon
• value() returns array (of array (of array)) of decimals.

[ymarcon]

Issue was closed with resolution "Fixed"