1.0.0: UttPipe

1. Introduced bian (edit) for recording the changing process of sequence.
2. Created Operators for sequence modification.
3. Created Pipe for connecting a sequence of operators to do sequence transformation.

Merged PRs:
#58 #46 #54 #53 #56 #55 #50 #48 #51 #49 #47 #44 #45 #42
#41 #40 #38 #37 #33 #35 #36 #32 #34 #31 #27 #21 #20 #17
#16 #15 #13 #14