Rewrite all parsing using hypothetical 'liquid-esrap'
Change used package name to ESRAP-LIQUID
Make small part of CL-YACLYAML work with ESRAP-LIQUID, comment the rest
Made very few tests actually pass, commented all others, version bump
Fix tests for double quoted scalars, add more elem tests
Make all tests for scalars work
Enabled some tests for block mappings and sequences
Fix bug with destructive modification of properties
Enable all tests for block mappings
Enable and fix all the existing tests, devise some new ones