Added a template users manual in doc/pyspeckit_manual.tex.
Added a template users manual in doc/pyspeckit_manual.tex.

dinossimpson/pyspeckit,vlas-sokolov/pyspeckit,mikelum/pyspeckit,low-sky/pyspeckit,allisony/pyspeckit,bsipocz/pyspeckit,jpinedaf/pyspeckit,keflavich/pyspeckit,allisony/pyspeckit,dinossimpson/pyspeckit,keflavich/pyspeckit-obsolete,pyspeckit/pyspeckit,pyspeckit/pyspeckit,vlas-sokolov/pyspeckit,mikelum/pyspeckit,bsipocz/pyspeckit,keflavich/pyspeckit,low-sky/pyspeckit,e-koch/pyspeckit,jpinedaf/pyspeckit,e-koch/pyspeckit