Initial commit of document
Fixed quotes, and changed section numbers.
Added the VCF 4.2 specification document. Made minor edits to function
lists.
Made changes to the INFO specification in VCF 4.2
Add VCF specification documents

And remove BCFv2.tex, as the VCF documents contain a copy of
its contents.
Merge VCF docs from github.com:amarcket/vcf_spec

Also remove BCFv2.tex, as the VCF documents contain a copy of
its contents.