Release v1.5.3

• Fix bug preventing writing a newly created grid to a file, when the grid
  float_type was not explicitly set

Release v1.5.2

• Fix for missing test data in PyPI package

Release v1.5.1

• Fix for PyPI publishing

Release v1.5

• NLLGrid.horizontal_recenter() method to move the (x, y) origin of grid
  cartesian system to the grid center
• NLLGrid.horizontal_rotate() method to rotate the grid horizontally around
  its center
• NLLGrid.nudge() method to expand or contract in any direction a grid
• Added TRANS_MERC and AZIMUTHAL_EQUIDIST projections
• Fix projections when map_rot != 0

Release v1.4.2

• Still another fix for version string

Release v1.4.1

• Fix version string reported by nllgrid.__version__

Release v1.4

• NLLGrid.get_value(): support for 2D grids
• NLLGrid.plot(): support for 2D grids
• Fixed: NLLGrid.get_value() now correctly returns angles,
  instead of None, for ANGLE and ANGLE2D grids

Release v1.3

• NLLGrid.iproject() method for inverse projection

Release v1.2.3

• Move to python-versioneer

Release v1.2.2

• Fixes for PyPI packaging