Merge pull request #7756 from lexual/indexing_docs_past_end

docs: rewrite .iloc accessing beyond ends.
BUG: DatetimeIndex.__iter__ creates a temp array of Timestamp (GH7683)

PERF: DatetimeIndex.__iter__ now uses ints_to_pydatetime with boxing

tslib: remove code dup in ints_to_pydatetime

PERF: add inline to create_timestamp_from_*
Merge pull request #7720 from jreback/iter

PERF: improve perf of index iteration (GH7683)
ENH: Add uint and bool support in to_stata

Added support for uint (uint8, uint16 and uint32, but not uint64) and bool
datatypes in to_stata.   Added an explanation of supported data types in io.rst.
closes #7097 and closes #7365