Add links to kata slides in readme.md.
Add links to kata slides in readme.md.

Signed-off-by: Donald Raab <e371c9f2db76e9a8da39f852655f641336d3aad3@gs.com>

epsstan/reladomo-kata,epsstan/reladomo-kata,goldmansachs/reladomo-kata,goldmansachs/reladomo-kata,gs-rezaem/reladomo-kata,gs-rezaem/reladomo-kata