Add RDoc for select_(hash|map|order_map)
Add RDoc for select_(hash|map|order_map)

beni55/sequel,davidbegin/sequel,bigfix/sequel,nju520/sequel,uhoh-itsmaciek/sequel,freshpay/sequel,dennis-d/custom_sequel,t-morgan/sequel,mpalmer/sequel,beni55/sequel,Marketcircle/sequel,nicohvi/sequel,uhoh-itsmaciek/sequel,yazshel/sequel,knut2/sequel,knut2/sequel,yazshel/sequel,nju520/sequel,chef/sequel,mpalmer/sequel,offshore-safety/sequel,t-morgan/sequel,reubano/sequel,dennis-d/custom_sequel,seeARMS/sequel,gferguson-gd/sequel,gferguson-gd/sequel,nicohvi/sequel,reubano/sequel,seeARMS/sequel,offshore-safety/sequel,tmm1/sequel,davidbegin/sequel,freshpay/sequel,pfarrell/sequel,offshore-safety/sequel,pfarrell/sequel