BUG: MPL Plot cannot make loglog option worked
DOC: minor documenation changes
Merge pull request #6722 from sinhrks/loglog

BUG: MPLPlot cannot make loglog keyword worked
API: all offset operations now return Timestamp types (rather than datetime), Business/Week frequencies were incorrect (GH4069)
Merge pull request #6743 from jreback/freq

API: all offset operations now return Timestamp types (rather than datetime) (GH4069)
TST: windows dtype correction
PRF: .shift() speedup: Only pass in c_contiguous arrays to np.roll/take
PRF: Fixed shift speed tests and added consolidated DataFrame shift perf
test
BUG: fix NDFrame.as_blocks() for sparse containers

SparseBlocks don't consolidate, so previous implementation silently
dropped all but the last blocks for given dtype.

Also, drop the 'columns' kwarg, there's reindex for that.
Merge pull request #6747 from dalejung/quick_shift_fixes

Quick shift fixes
Merge pull request #6748 from immerrr/fix-as-blocks-for-sparse

BUG: fix NDFrame.as_blocks() for sparse containers
BUG: NaTType can be unpickled properly
Fix SQLLegacy to allow parameters as mapping
Add SQL read_parameters tests
Merge pull request #6709 from gpoulin2/master

BUG: Allow mapping as parameters for SQL DBAPI2
PRF: Adding Panels.shift test
ENH: Panel.shift now uses NDFrame.shift.
DOC: Panel.shift no longer drops periods.