- argv is (const char *const *) everywhere, to avoid having to strdup() all the
Java arg strings
- changed (char*) to (const char*) in lots of places to fix cascading compiler
warnings as a result of argv constness
- fixed a bug in "config get" command when used without 'variable' arg
- new test cases to cover new payload with different versions
- exit status of 2 when duplicate is detected
- tighten up other test cases
- fix bug in sqlite_exec_int64()
- adding a bundle using an existing manifest with an incorrect payload should
fail with an error
- adding a bundle using an existing manifest to update the payload to a new
version should succeed
- improve format of "dna rhizome list" output to one bundle per line
- If a bundle has the same payload hash and manifest.name as one already in
the rhizome store, then the "dna rhizome add" command will not add it
- Now passes fourth test case in tests/dna_rhizome
