BLD: update submit_cache.py to to properly submit caches to iron.io
TST: nose.Skiptest on RemoteDataErrors in tests for io.data.Options

Added to release notes

Added to release notes

Fixed warning tests for RemoteDataError

TST: nose.Skiptest on RemoteDataErrors in tests for io.data.Options

Added to release notes

Conflicts:
	doc/source/release.rst
Merge pull request #7034 from dstephens99/OptionTests

TST: nose.SkipTest on RemoteDataErrors in tests for io.data.Options
PERF: optimize Index.delete for dtype=object
TST: clean skipping tests in test_offsets
Merge pull request #7042 from jreback/test_offset

TST: clean skipping tests in test_offsets
Merge pull request #7040 from immerrr/perf-index-delete

PERF: optimize Index.delete for dtype=object
ENH: Extends the number of Periods supported by allowing for Python defined Periods. Periods now hold reference to Offset rather than just freqstr (GH5148).
API: inferred_freq is a DateOffset subclass rather than a string. (GH5082)
removed freq_obj and changed api for freq
fix issues with freq change