Add a new version of fasta that uses qio

This version of fasta uses qio+whole array binary I/O to write out the
data. It should perform similar to fasta-printf.


git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@23826 3a8e244f-b0f2-452b-bcba-4c88e055c3ca