simplify form validation example and link to required/optional methods
simplify form validation example and link to required/optional methods

jamadam/mojo,s1037989/mojo,kberov/mojo,polettix/mojo,kiwiroy/mojo,CandyAngel/mojo,Grinnz/mojo,kraih/mojo,lindleyw/mojo,s1037989/mojo,marcusramberg/mojo