readdlm handle CRLF line ending with quoted column
fix #6390 (jl_repl_raise_sigtstp not found on windows)
new experimental feature: control over the native exported name of a function
ref #6285

ccallable(func, [ret_type], arg_type, [name])

is similar to cfunction(), but adds an alias "name" to the global
symbol table exported from sys.so (defaults to the function name).

a method definition can also be prefixed with `@ccallable`

also:
- load sys.so with RTLD_GLOBAL
- shorten jlcall wrapper names to jlcall_f instead of jlcall_julia_f
Enable loop deletion pass.
Ignore REQUIRE when giving suggestions of packages after using
Merge pull request #6402 from ArchRobison/adr/loopdel

Enable loop deletion pass.
Merge pull request #6406 from ivarne/REQUIRE

Ignore REQUIRE when giving suggestions of packages after using
add a version of jl_init that lets you specify a system image file
Merge branch 'master' of https://github.com/JuliaLang/julia
Merge pull request #6392 from tanmaykm/readcsv

readdlm handle CRLF line ending with quoted column
split util.jl to separate functions that are for interactive convenience
Merge branch 'master' of https://github.com/JuliaLang/julia