* Adds relative-strength percentile to stocks/ta
* allow exporting tables
* shifted from common to stocks and added tests
* added documentation
* added in nav bar
* fix test
* remove whitespace in docstring
* fix type error
* fix test
* fix tests
* test
* added tickers to a separate table
* add image to doc
Co-authored-by: Jeroen Bouma <jer.bouma@gmail.com>