added flow froperties to the split properties lookup table
Initial implementation of Readium.framework
Changed Readium framework prefix from RD to RDF

Apple asserts the right to all two-letter prefixes (e.g. RD), so switching
to the three-letter RDF prefix (for ReaDium Foundation) ensures we're in
compliance with Apple's rules.
Cleaned up shell scripts and removed redundant build step
Minor framework build script cleanup