Fixed warnings from cl.h on 64 bit target
Lowered version requirement for standard CMake package on Ubuntu
Merge branch 'master' of https://github.com/halide/Halide
Added overloads of realize to enable passing target without all 4 sizes
Passed Target instance to compile_* and realize
Added more overloads to support default Target argument
Removed debugging code
Reverted attempt to fix warnings re: stdcall ignored, breaks on windows
Freeze a pnacl version that is known to work.
Fix for trunk llvm removing a method
Merge pull request #218 from dsharlet-intel/master

Adding target parameters to the tests/apps
JIT tests with explicit targets use HL_JIT_TARGET

They were using HL_TARGET, which is supposed to
just control static compilation now.
Fix missing return value in tracing test.
Merge branch 'master' of github.com:halide/Halide
Merge branch 'master' into rvar_reorder