Fix cleaning dyncall on MinGW
Make dyncall build on MinGW more robust
Point dyncall submodule to MoarVM repository.

Not quite sure why it worked for me before ;)
updated linenoise to latest version
fixed build with mingw32

This happens when in a cmd window, and gmake complains sh
updated Configure.pl --help documentation
code cleanups
small optimization
change calloc to malloc
Merge branch 'master' into warnings
Fix more warnings