Merge pull request #52 from shamaton/feature/time-local-utc-decode

add SetDecodedTimeAsUTC / SetDecodedTimeAsLocal; update README Announcement

Merge pull request #48 from shamaton/fix_ext

Fix calcuration size of Ext format

update README

Merge pull request #45 from shamaton/fix_issue_44

Fix UnmarshalRead binary slice case

Merge pull request #41 from shamaton/fix_stream_ext_encoder

Update stream ext encoder interface

Merge pull request #39 from shamaton/add_internal_tests

Add internal tests and fix some bugs

Merge pull request #38 from shamaton/feature/streaming

Add streaming function

Merge pull request #32 from shamaton/case_crash

Return error when strange data is received

Merge pull request #27 from shamaton/not_using_unsafe

Not using unsafe

check nil data