Merge pull request #13 from ngrewe/ci

Fix the objc_msgSend testcase (typo) and add a .travis.yml for CI builds

.travis.yml

@@ -0,0 +1,8 @@
+language: cpp
+compiler: clang
+script:
+        - mkdir build
+        - cd build
+        - cmake -DCMAKE_BUILD_TYPE=Debug ..
+        - cmake --build .
+        - ctest

Test/objc_msgSend.m

@@ -165,7 +165,7 @@ IMP forward(id o, SEL s)
 }
 
 static struct objc_slot slot;
-struct objc_slot *forwardslot(id o, SEL s)
+struct objc_slot *forward_slot(id o, SEL s)
 {
 	slot.method = (IMP)fwd;
 	return &slot;