TDbf 6.3.0 released

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V6.3.0

- fixed: tdbf.physicalrecno not in sync with tdataset
- added: loPartialKey functionality on index search
- fixed: mdx file presence not written to dbf header; index does not work (rep by paez)
- fixed: searchkey on deleted row returns true (rep by sysklop)
- fixed: primary index creation throws "list index out of bounds(0)" (rep by sysklop)