process ids are independent of nprocs()
Fixed loop bug in require()
Changed names to procs() and workers()
Migrated isapprox() to base
Added test suite for isapprox()
Documentation for isapprox()
Removed duplicate definitions of rtoldefault and atoldefault methods
Test and export hooks for isapprox
add wait(Process), returning its exit code
Merge pull request #3394 from amitmurthy/amitm/multi

RFC : process ids are independent of nprocs() and others
Simplified implementation for real nonfloats as well as for complex numbers
Fix redirection operators

Fixes #2259
Fixes #2355
Fixes #3347
Updated documentation for isapprox()
small amount of cleanup in multi.jl
update plife example
Merge branch 'master' of github.com:JuliaLang/julia
Fix SubString{UTF8}

* case which led to endof < 0
* out-of-bounds case
Fix replace for UTF8 strings
Fix redirection deprecation warnings
Use `|>` for function piping instead of `|`
fix trivial README confusion