ENH: make read_raw_segment into a method called read_segment
REN: read_raw_segment to read_segment
ENH: make read_raw_segment into a method called read_segment

ENH: pep8

ENH: spell
update whats new
ENH: make read_segment, read_segment_times PRIV
FIX: Keep users from making mistakes
ENH: make read_segment PRIV
Merge pull request #501 from Eric89GXL/forward-err

FIX: Keep users from making mistakes
FIX: indexing for append method
Merge pull request #499 from t3on/tb-raw

ENH: make read_raw_segment into a method called read_segment