Add Finance Library Library Bundle

Signed-off-by: JamesDeFabia <james.defabia@lexisnexis.com>

- Rename FinanceLibraryBundle.ecl to Finance.ecl
- Update README.rst
- Edits made based on code review
- Added __selftest to main bundle
- Changed local definitions to SHARED in __selfTest module
- Added NAMED to __selfTest OUTPUTs for clarity
- fixed formatting
- Added __selfTest.ALL for ease of use.