vector_wrap option causes mismatch between field and collection geometry #267

Moved some example files around and added a check to make sure the
geometry is correctly inserted into the collection. The issue occurs
when 0 to 360 longitudinal data is used and vector_wrap is True. Now
the geometry is appropriately copied in subset.

Closes #267.
handling of "point" spatial abstraction #214

Point abstraction is now used for operations even if overload and
bounds/polygons are available.
Merge branch 'master' into i243-large-array
mark - added optimizations to OcgOperations
mark - before modifying subset
mark - all tests working
mark - doc changes
mark - all tests working after optimizations for temporal grouping
added new examples and minor mods to logging messages
Merge branch 'master' into i243-large-array
mark - docstring
mark - all tests working; before adding field overloads
mark - all tests working; introduced optimizations