Fix DataFrame.resample bug for empty DataFrame #2640
BUG: boolean groupby performance issue. close #2692
DOC: correct default merge suffixes: _x,_y
BUG: implement 64-bit int overflowing case in merge. close #2690
DOC: Add docstring to the 'io.sql.has_table' function.
BUG: fix data borking in to_datetime called on Series with datetime64 values already. close #2699
BUG: DataFrame.from_records bug with index column and empty record list. close #2633
ENH: raise exc if find NA values when explicit integer dtype passed to read_* functions. close #2631
BUG: parser-tokenizer incorrect state in trailing field handling logic. stupid goto. close #2668
BUG: don't exclude non-numeric data in groupby.max/min. close #2700
DOC: Write a section about SQL query wrappers to I/O part. close 2541
DOC: Complete IO/SQL part.

- Change the title.
- List other functions of the module 'io.sql'.
BUG: escaping <> in pandas HTML tables #2617
ENH: attempt iso8601 date parsing in read_csv and friends. close #2698
BUG: Series op with datetime64 values misbehaves in numpy 1.6
BUG: don't lose time zone in DatetimeIndex.drop. close #2621