BUG: TextReader._explicit_index_names() should allow for unicode index_name
BUG: parsers._concat_date_cols should accept unicode
TST: test dataframe to_csv() with unicode index and columns
TST: test series to_csv() with unicode index
BUG: csvwriter writerow() now delegates to pprint_thing() for non-text objects
TST: add test for UnicodeWriter with csv.QUOTE_NONNUMERIC
ENH: add is_number() helper to pd.core.common
ENH: UnicodeWriter (CSV) now supports quoting=csv.QUOTE_NONNUMERIC
CLN: Expunge stringify_seq() in favor of pprint_thing() in Index.format()
BUG: Add checks to df,series repr() to handle python3
TST: repr() should return type str() on py2 and py3
ENH: Index.__repr__ now uses pprint_thing/_encoded().

result should not change, unless unicode is present.
CLN: Abolish stringify and _strify in favor of pprint_thing()
DOC: closes #1709, add link to iris data set
CLN: cleanup tox.ini, remove stale pandas/setup.py, fix tox warning

tox was complaining about "this is the wrong setup.py to use"
because tox.ini was manually invoking pandas/setup.py, which
has been superceeed by the root setup.py

- the use of changedir= has been made clearer.
- now removes the pandas uninstall from the venv after the tests.
  (but only if they succeed due to a limitation in tox)
TST: Added Script for running tox instances in parallel.
RLS: bump minor to 0.9.1, released=False
Merge remote-tracking branch 'y-p/cleanup_tox'

* y-p/cleanup_tox:
  CLN: cleanup tox.ini, remove stale pandas/setup.py, fix tox warning
Merge remote-tracking branch 'y-p/fast_testing'

* y-p/fast_testing:
  TST: Added Script for running tox instances in parallel.
  BLD: added caching to setup.py - speeds up testing dramatically.
ENH: improve display of hierarchical columns in to_html