[#1812] skip test that relies on physical path

S3 does not have a physical path, so the test cannot assert that the path exists.
[#1812] iadmin mkresc now returns stdout
[#1813] xml library missing from plugin build
[#1813] use libxml2 not libxml
[#1812] update other iadmin mkresc for listing
[#1813] libxml2 needs to be linked after dependent libraries
[#1814] add libcurl to Makefile
[#1813] [#1814] new package dependencies
[#1815] bump version to 1.1
[#1815] update README