Do not unzip /vsizip/ input paths

This is the virtual driver for zip files.
Prevent emitting two successive errors when outputting to a zip file
Merge pull request #5 from boreal-is/master

Prevent emitting two successive errors when outputting to a zip file
Added PGDump from the ogr2ogr docs - PostgreSQL is not a valid driver option, but that is now an alias to PGDump.
Added an example for postgresql
removed accidental console.logs from when I was debugging and testing my change
Merge pull request #6 from ChrisCarto/master

updated Postgresql to the PGDump driver name
add; more hipster to the build status
Release 0.3.1
add; docker support
add; docker workaround for tmpdir issue
add; sample cryllic file