API: Add return_type kwarg to boxplot

update docs

API: Let 'by' and groupby follow return_type

Write all the docs
DOC: Use shared docstring
TST: restore matplotlib defaults before testing
DOC: v0.14.0.txt updates
DOC: update setup.py with 3.4 note
RLS: v0.14.0 release candidate 1
SQL: add release notes for refactor (GH6292)
DOC: update sql docs

- minor edits
- remove mention of object PandasSQLWithEngine, as this API is not yet finalized yet, so not yet meant for public use
SQL: update some signatures and docstrings:

- remove meta kwarg from read_sql_table (see discussion in #6300)
- remove flavor kwarg from read_sql (not necessary + not there in 0.13, so would have been API change)
- update docstring of to_sql in generic with latest changes
- enhance docstring of get_schema
Merge pull request #7120 from jorisvandenbossche/sql-release

SQL: add release notes for refactor (GH6292)
RLS: set isreleased=False
TST Fix AttributeError: 'iterator' object has no attribute 'next' on Python 3
Merge pull request #7148 from cgohlke/patch-1

TST Fix AttributeError: 'iterator' object has no attribute 'next' on Python 3
TST:  test fixes for plotting with old scipy (GH7151)
COMPAT: 2.6 format spec compat

BUG: TestCase instances cant assertRaisesRegexp so use tm
Merge pull request #7153 from cpcloud/test-compat-2.6-7152

BUG/COMPAT: test compat on Python 2.6
CLN: Python 3.4 deprecation of assert_

#7131: replace instances of assert_(not b) with assertFalse(b) and some instances of assert_(b) with assertTrue(b). Work-in-progress
BUG: hashtable memory error causes test_factorize_nan crash
BUG: PeriodIndex slices with out of bounds results incorrect
Merge pull request #7161 from sinhrks/pslice2

BUG: PeriodIndex slices with out of bounds results incorrect