ignore newvar nodes in var occurrence checks
Update Dict pop!/delete! changes to latest Julia, remove warnings
Merge pull request #3983 from JuliaLang/kf/unsafestore

Align unsafe_store! semantics with unsafe_load semantics
Merge pull request #3984 from JuliaLang/kf/llvm34

Allow building llvm from git; support llvm3.4svn
provide method for converting MathConsts to Float16.
use NewvarNode type instead of Expr for newvar nodes
Merge branch 'master' of github.com:JuliaLang/julia into jb/newvars
Float16: add realmin, realmax, nextfloat, eps, maxintfloat
Merge branch 'jb/newvars' of github.com:JuliaLang/julia
Merge branch 'master' of github.com:JuliaLang/julia
Fixed add/add! deprecations.
fix typo in clamp documentation
document for loop and comprehension scope behavior
Merge pull request #3993 from schenker/master

fix typo in clamp documentation
add jl_flush_cstdio to expmap (for Linux)
leave a note about how to more aggressively re-null variables
fix #3992
Combinations iterator, for #3989
based on code by @kmsquire
Add in `contrib/debug_bootstrap.gdb` for https://gist.github.com/staticfloat/6188418
clarify ccall syntax in doc