arraycopy: move related classes to dedicated package
ArrayCopyNode: simplify condition
amd64 register config: reserve "home space" on windows in frame.
arraycopytests: test for disjoint
arraycopy: don't use checkcast stub if the arrays overlap
mx: removed unused _read_projects_file function
mx: changes towards supporting python 2.6 for call to mx from make/Makefile
removed reference to com.oracle.graal.compiler.CompilerThread from VM code
try to be more precise about python executable name
Truffle-DSL: fixed several bugs when using arrays as type. added arrays test.