Merge pull request #3758 from jreback/parse_na

BUG: (GH3611) revisited; read_excel not passing thru options to ExcelFile.parse
TST: travis to build numexpr/tables on py3k
DOC: docstring/release notes updates for py3k

DOC: v0.11.1 updates
ENH: provide py3k string decoding and compat
ENH: added TermValue, and do readWhere with condvars
TST: fixed do_copy testing
BUG: more encoding/decoding issues