Moved float str buffer constants to the strconv module
pre-rebase commit
Switched over a bunch of splitting funktions to non-allocating iterators
Isolated bug, static vector seems to behave differently than fixed sized one
Fixed all use sites and tests
Added missing lifetime annotations, doc and whitespace cleanups
Added more missing lifetime annotations
core: Clarify prelude docs. #4556
core: Make sure every module at least has a one-line description
auto merge of #5532 : brson/rust/coredocs, r=brson

r?
core: Hide GC docs
Update 0.6 release notes
Add missing authors
auto merge of #5467 : nikomatsakis/rust/issues-3888-4036-4492-cannot-encode-region-variables, r=nikomatsakis

The basic problem was that vtables were not being resolved.  The fix uncovered another issue, which was that the syntax extensions were not creating method calls properly and were relying on outdated code in typeck, so I fixed that too.  

Resolves issues #3888, #4036, #4492.

r? @catamorphism
auto merge of #5555 : Kimundi/rust/str-dealloc-3, r=catamorphism

- Most functions that used to return `~[~str]` for a list of substrings got turned into iterators over `&str` slices
- Some cleanup of apis, docs and code layout
core: As per #4898, finish impls for one-tuples
Remove unused imports throughout
syntax: Removing uses of HashMap
doc: Remove mentions of oldmap::HashMap
rustc: Remove uses of oldmap::HashMap