Utility functions#1129

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Yoric wants to merge 8 commits intorust-lang:masterfrom

Commits on Nov 4, 2011

str.rs: Added functions loop_chars, loop_chars_sub, char_len_range, byte_len_range.
David Rajchenbach-Teller
committed
uint.rs: added functions div_ceil, div_floor, div_round
David Rajchenbach-Teller
committed
char.rs: Added a function cmp
David Rajchenbach-Teller
committed
stdlib: Added a small rope library
David Rajchenbach-Teller
committed

Commits on Nov 5, 2011

Fixup: forgotten stdtest/rope.rs
David Rajchenbach-Teller
committed
[Docfix + Renaming] lib/rope.rs: Applied review suggestions, mostly docfixes.
David Rajchenbach-Teller
committed
[Docfixes + feature] lib/uint.rs: Applied review suggesions, took the opportunity to add function loop
David Rajchenbach-Teller
committed
[Docfix] lib/str.rs: Applied review suggestions, took the opportunity to improve doc of my new functions.
David Rajchenbach-Teller
committed