Add basic Random package documentation.
Add basic Random package documentation.

Also adds some basic docs on Random trait.

cquinn/ponyc,boemmels/ponyc,boemmels/ponyc,cquinn/ponyc,lukecheeseman/ponyta,CausalityLtd/ponyc,Perelandric/ponyc,jemc/ponyc,Praetonus/ponyc,sgebbie/ponyc,Praetonus/ponyc,dipinhora/ponyc,mkfifo/ponyc,ponylang/ponyc,kulibali/ponyc,jemc/ponyc,jupvfranco/ponyc,doublec/ponyc,malthe/ponyc,dipinhora/ponyc,sgebbie/ponyc,boemmels/ponyc,jupvfranco/ponyc,CausalityLtd/ponyc,kulibali/ponyc,lukecheeseman/ponyta,boemmels/ponyc,dipinhora/ponyc,jemc/ponyc,doublec/ponyc,Theodus/ponyc,Perelandric/ponyc,mkfifo/ponyc,jupvfranco/ponyc,kulibali/ponyc,mkfifo/ponyc,jupvfranco/ponyc,Perelandric/ponyc,ryanai3/ponyc,Perelandric/ponyc,Theodus/ponyc,doublec/ponyc,Praetonus/ponyc,ponylang/ponyc,sgebbie/ponyc,Praetonus/ponyc,malthe/ponyc,mkfifo/ponyc,CausalityLtd/ponyc,boemmels/ponyc,ryanai3/ponyc,sgebbie/ponyc,kulibali/ponyc,Theodus/ponyc,Theodus/ponyc,cquinn/ponyc,lukecheeseman/ponyta,Perelandric/ponyc,Theodus/ponyc,ryanai3/ponyc,jupvfranco/ponyc,ponylang/ponyc,malthe/ponyc,mkfifo/ponyc,cquinn/ponyc,malthe/ponyc,sgebbie/ponyc