Adds semantic tests to test framework and isoltest.

test/libsolidity/semanticTests/smoke_test.sol

@@ -0,0 +1,17 @@
+contract C {
+    function f() public returns (uint) {
+        return 1;
+    }
+    function g(uint x, uint y) public returns (uint) {
+        return x - y;
+    }
+    function h() public payable returns (uint) {
+        return f();
+    }
+}
+// ----
+// f() -> 1
+// g(uint256,uint256): 1, -2 -> 3
+// h(), 1 ether -> 1
+// j() -> FAILURE
+// i() # Does not exist. # -> FAILURE # Reverts. #

test/libsolidity/semanticTests/smoke_test_multiline.sol

@@ -0,0 +1,11 @@
+contract C {
+    function f(uint a, uint b, uint c, uint d, uint e) public returns (uint) {
+        return a + b + c + d + e;
+    }
+}
+// ----
+// f(uint256,uint256,uint256,uint256,uint256): 1, 1, 1, 1, 1
+// -> 5
+// g()
+// # g() does not exist #
+// -> FAILURE

test/libsolidity/semanticTests/smoke_test_multiline_comments.sol

@@ -0,0 +1,17 @@
+contract C {
+    function f(uint a, uint b, uint c, uint d, uint e) public returns (uint) {
+        return a + b + c + d + e;
+    }
+}
+// ----
+// f(uint256,uint256,uint256,uint256,uint256): 1, 1, 1, 1, 1
+// # A comment on the function parameters. #
+// -> 5
+// f(uint256,uint256,uint256,uint256,uint256):
+// 1,
+// 1,
+// 1,
+// 1,
+// 1
+// -> 5
+// # Should return sum of all parameters. #