Adds indexing to CArray methods
Adds indexing to CArray methods

Changes the CArray index itself to the CArray methods section, and
makes small corrections on this section. Closes #2032.

stmuk/doc,perl6/doc,dmaestro/doc,dmaestro/doc,MasterDuke17/doc,MasterDuke17/doc,jonathanstowe/doc,tbrowder/doc,jonathanstowe/doc,tbrowder/doc,perl6/doc,jonathanstowe/doc,stmuk/doc,MasterDuke17/doc,perl6/doc,tbrowder/doc,dmaestro/doc,MasterDuke17/doc,stmuk/doc,perl6/doc,jonathanstowe/doc,stmuk/doc,stmuk/doc,tbrowder/doc,dmaestro/doc,jonathanstowe/doc,perl6/doc,dmaestro/doc