Latest changes:

- Removed short options -1 .. -6
- Rebased

Add scripts/get-shapefiles.py

Previous changes:
- Removed unneeded information from the documentation
- Compliance to PEP8 style guide, typo correction and some revision
- Coding revised to fully comply to PEP8 style guide
- A documentation typo has been fixed
- Additional documentation provided
- Some minor code improvements
- code compacted and exploiting a dictionary
- added execution flag
- tested with Windows, Ubuntu and Cygwin
- file dates are checked before downloading new files
- curl is used if available
- return codes are checked
- documentation updated
- now update is the default and does not require confirmation
- code improvements

$ ./get-shapefiles.py -h
usage: get-shapefiles.py [-h] [-c] [-d <directory name>] [-e] [-f] [-l] [-n]
                         [-p] [-r] [-s] [-u] [--world-boundaries]
                         [--simplified-land] [--ne-admin] [--land-polygons]
                         [--icesheet-polygons] [--icesheet-outlines]

optional arguments:
  -h, --help            show this help message and exit
  -c, --check           check whether the 'data' directory already exists
  -d <directory name>, --directory <directory name>
                        set the name of the data directory (default: 'data')
  -e, --no-extract      do not populate target directories with the expansion
                        of downloaded data
  -f, --force           force continuing even if project.yaml does not exist
  -l, --no-curl         do not use 'curl' even if available
  -n, --no-download     do not download archive if already existing locally
  -p, --pause           pause before starting
  -r, --remove          remove each downloaded archive after its expansion
  -s, --no-shape        do not run shapeindex
  -u, --update          force downloading files even if not newer than the
                        locally existing ones
  --world-boundaries    only process world_boundaries
  --simplified-land     only process simplified-land-polygons-complete-3857
  --ne-admin            only process ne_110m_admin_0_boundary_lines_land
  --land-polygons       only process land-polygons-split-3857
  --icesheet-polygons   only process antarctica-icesheet-polygons-3857
  --icesheet-outlines   only process antarctica-icesheet-outlines-3857

This script generates and populates the 'data' directory with all needed
shapefiles, including indexing them through shapeindex.

INSTALL.md

@@ -21,13 +21,14 @@ psql -d gis -f indexes.sql
 Additionally you need some shapefiles.
 
 ## Scripted download
-
-To download the shapefiles you can run the following script from this directory. No further steps should be needed as the data has been processed and placed in the requisite directories.
+To download the shapefiles you can run the following script. No further steps should be needed as the data has been processed and placed in the requisite directories.
 
 ```
-./get-shapefiles.sh
+scripts/get-shapefiles.py
 ```
 
+This script generates and populates the *data* directory with all needed shapefiles, including indexing them through *shapeindex*.
+
 ## Manual download
 
 You can also download them manually at the following paths: