Revert change to test scripts that was deleting all but one distrib
Merge branch 'master' of github.com:halide/Halide
Error appends newline before printing if there isn't one already
Merge branch 'master' of github.com:halide/Halide
Type-check buffers even if they're only passed to extern stages.
Windows script tweaks
Merge branch 'master' of https://github.com/Halide/halide
Switch the tests to llvms 3.4, 3.5, trunk, pnacl.

This drops 3.2 and 3.3 from nightly testing.
Merge branch 'master' of github.com:halide/Halide
Merge branch 'master' into glsl_float_textures
Fix indentation