#[link_args] -> #[link] extern ... {}
added .gitignore.
Merge pull request #1 from lifthrasiir/link-attr

Updated link attributes
Makefile: clean rlib
wchar: Add .to_c_u16()
wchar: Remove unused CU16String methods
Update for language changes
Makefile: fix custom $(RUSTC) usage
gdi: Add struct PaintDC
window: Add Window.show_async()
Update for language changes
gdi: Add struct MemoryDc/Bitmap
Update for language changes

`std::vec_ng` -> `std::vec`
Update for language changes
Update for language changes
Update for language changes
ll: Re-arrange basic types
Update for language changes

`~T` -> `Box<T>`, `~t` -> `box t`
Update for language changes