prep 0.15.0 release (#844)

doc(book): data transfer to Python (#843)

doc: fix metadata docs for tables (#841)

feat: ergonomic column access for remaining tables (#840)

feat: ergonomic access to site table position column (#839)

remove documentation for fns returning impl TableColumn (#838)

doc: fix error re: need to declare a dependency (#837)

prep release (#836)

test: add python/zerocopy to test tables, etc., with Python allocator (#835)

Change to debug version of Python for GitHub actions (#834)

feat: TableCollection.new_from_raw (#833)

feat: Consume TableCollection, returning pointer (#830)

bump baptiste0928/cargo-install from 3.3.2 to 3.4.0 (#827)

style(docs): minor formatting fixes (#828)

Run tests vs stable on 64 bit x86 Linux (#825)