Note changes and bump version.

1.3.2 here we come.

Note fix of shapely#106 and shapely#114 for 1.3.1.

Last tweaks to docs, update of change log.

Updates to manual and change log for 1.2.18.

Note date in change log and remove VERSION.txt from version control.

Release 1.2.15

1.2.14

Release 1.2.13