Add two more xforms for field name cleanup
Create remove-empty-strings and sanitize-field-names xforms, enable by default
Add comment that post-denorm-cleanup fns are enabled by default
Update README: (:gen-class)
Cleanup formatting of CLI options definitions
Add test case for post-denorm-cleanup xforms
Fixed bug where the CLI couldn't read from stdin anymore
--schema-path and --header-path are now --schema and --header