Merge branch 'timeseries'

* timeseries: (200 commits)
  TST: don't use deprecated DateRange
  BUG: fix buglets surfacing from merge
  RLS: set released to false, bump dev version to 0.8.0
  BUG: fix major performance issue in DatetimeIndex.union affecting join performance on irregular indexes, remedying #1046
  ENH: add to_datetime method to Index, close #208
  ENH: legacy time rule support and refactoring, better alias handling. misc tests, #1041
  ENH: to_datetime will convert array of strings and NAs to datetime64 with NaT, close #999
  ENH: more datetime64 integration in core data algorithms per #996, close #1035
  ENH: handle datetime64 in block formation from dict of arrays in DataFrame constructor, close #1037
  BUG: fix broken time_rule usage in legacy DateRange, close #1036
  BUG: name inline method something different
  ENH: initial version of convert_to_annual for pandas, #736
  BUG: convert datetime64 -> datetime.datetime for matplotlib, close #1003
  ENH: integrate cython ohlc in groupby and test, close #152
  ENH: implement Cython OHLC function for groupby #152
  ENH: use cython bin groupers, fix bug in DatetimeIndex.__getitem causing slowness, some timeseries vbenches
  ENH: enable to_datetime to be vectorized, handle NAs, close #858
  TST: interactions between array of datetime objects and DatetimeIndex, bug fixes
  TST: remove errant foo and test_datetime64.py
  TST: moved test_datetime64.py tests to test_timeseries
  ...

Author: wesm

Diff for: .gitignore

@@ -5,6 +5,9 @@ build
 dist
 MANIFEST
 *.c
+!np_datetime.c
+!np_datetime_strings.c
+!skts.c
 *.cpp
 *.so
 *.pyd
@@ -16,4 +19,4 @@ doc/source/vbench.rst
 *flymake*
 scikits
 .coverage
-pandas.egg-info
+pandas.egg-info

Diff for: NP_LICENSE.txt

@@ -0,0 +1,30 @@
+Copyright (c) 2005-2011, NumPy Developers.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+       copyright notice, this list of conditions and the following
+       disclaimer in the documentation and/or other materials provided
+       with the distribution.
+
+    * Neither the name of the NumPy Developers nor the names of any
+       contributors may be used to endorse or promote products derived
+       from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Diff for: bench/bench_dense_to_sparse.py

@@ -4,7 +4,7 @@
 N = 100000
 rng = DateRange('1/1/2000', periods=N, offset=datetools.Minute())
 
-rng2 = np.asarray(rng).astype('M8').astype('i8')
+rng2 = np.asarray(rng).astype('M8[us]').astype('i8')
 
 series = {}
 for i in range(1, K + 1):

Diff for: bench/bench_tseries.py

@@ -2,17 +2,24 @@
 
 import numpy as np
 
-from pandas.core.datetools import DateOffset
+from pandas.core.datetools import DateOffset, to_datetime
 import pandas.core.datetools as datetools
 
 from pandas.core.common import isnull, notnull, save, load
 from pandas.core.format import set_printoptions
-from pandas.core.index import Index, Int64Index, Factor, MultiIndex
+from pandas.core.index import (Index, Int64Index, Factor, MultiIndex,
+                               DatetimeIndex, IntervalIndex)
+
+# deprecated
 from pandas.core.daterange import DateRange
+
+from pandas.core.daterange import date_range, bdate_range
+from pandas.core.datetools import Timestamp, Interval
+
 from pandas.core.series import Series, TimeSeries
 from pandas.core.frame import DataFrame
 from pandas.core.panel import Panel
-from pandas.core.groupby import groupby
+from pandas.core.groupby import groupby, TimeGrouper
 from pandas.core.reshape import pivot_simple as pivot
 
 DataMatrix = DataFrame