Add basic css style
Add basic css style

Shamelessly stolen from perl6/doc

Quinny/perl6-examples,stmuk/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,shlomif/perl6-examples,stmuk/perl6-examples,Quinny/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,stmuk/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,stmuk/perl6-examples