Improved README.pod.
Improved README.pod.

The content is the same, but this version uses slightly less jargon and
attempts to introduce new concepts more gradually for people unfamiliar with
MVC or the Mojolicious approach.

zoffixznet/mojo,jamadam/mojo,andrewsolomon/mojo,scottw/mojo,melezhik/mojo,vlet/mojo,dolmen/p5-Mojolicious,melezhik/mojo,polettix/mojo,augensalat/mojo,chenri/mojo,kiwiroy/mojo,jenalgit/mojo,lindleyw/mojo,andrewsolomon/mojo,kraih/mojo,zoffixznet/mojo,dotandimet/mojo,CandyAngel/mojo,Grinnz/mojo,vlet/mojo,kak-tus/mojo,marcusramberg/mojo,s1037989/mojo,kberov/mojo,s1037989/mojo,jenalgit/mojo