dcp_inspect: Bring back dnQualifier for rubies < 1.9.3
dcp_inspect: Helpers element_text(), uuid_from_urn_scheme()
dcp_inspect: Align IssueDate info (past and future)
dcp_inspect: Move all of Info summary to conclude the run
dcp_inspect: Check asset filenames for whitespace
dcp_inspect: Print info about missing Hash value in PKL stage
dcp_inspect: Bump version