Merge remote-tracking branch 'origin/master' into rollup

Conflicts:
	src/libcollections/slice.rs
	src/libcore/nonzero.rs
	src/libcore/ops.rs

Author: Manishearth

mk/tests.mk

@@ -301,6 +301,7 @@ tidy:
 		| grep '^$(S)src/rust-installer' -v \
 		| xargs $(CFG_PYTHON) $(S)src/etc/check-binaries.py
 		$(Q) $(CFG_PYTHON) $(S)src/etc/errorck.py $(S)src/
+		$(Q) $(CFG_PYTHON) $(S)src/etc/featureck.py $(S)src/
 
 
 endif

src/compiletest/compiletest.rs

@@ -13,7 +13,15 @@
 #![feature(slicing_syntax, unboxed_closures)]
 #![feature(box_syntax)]
 #![feature(int_uint)]
-#![allow(unstable)]
+#![feature(test)]
+#![feature(rustc_private)]
+#![feature(std_misc)]
+#![feature(path)]
+#![feature(io)]
+#![feature(core)]
+#![feature(collections)]
+#![feature(os)]
+#![feature(unicode)]
 
 #![deny(warnings)]