ENH: Allow referencing of Excel columns by their Excel column names.
Fixed bug
merge c6662de
TST: Added _skip_if_no_xlrd() to skip test when `xlrd` is not installed.
DOC: rls notes
ENH: enable DataFrame.dot to accept ndarrays. close #2042
ENH: also catch UnboundLocalError. close #2068
BUG: correct computation of min/max for datetime64 and box result. close #2083
BUG: fix unstacking edge case failure when filtering unrepresented combinations. close #2100
BUG: fix str.split failure with pipe '|' pattern. close #2119
BUG: fix formatting of dict entries in Series/DataFrame. close #2144
BUG: cast datetime64 values to nanoseconds in DataFrame ctor. close #2095
BUG: correct inf/-inf handling in read_csv. close #2041
DOC: fix flow issue, add dataframe constructor before example. close #2061
ENH: per-level sort order in sort/sort_index. close #928
ENH: intersection on DatetimeIndex with empty fails for monotonic with anchored offset
ENH: ~ for DataFrame #2110
DOC: correct default sep in to_csv, close #2156
DOC: remove old reference to index uniqueness. close #2043
BUG: setitem with Timestamp #2155