fix #2446, fix #1689, fix libuv #5. bump version of libuv to latest origin/master from upstream
fix mac build by disabling set process title feature of libuv
update webrepl build for libuv changes to uv_run
fix #2352

Conflicts:
	test/core.jl
fix #2365

Conflicts:
	test/core.jl
fix #2400, fix #2401

Conflicts:
	src/ast.c