Use JSON, unifying settings.

resources/testproject/project.c3p

@@ -0,0 +1,27 @@
+{
+  "version": "0.1.0",
+  "authors": [
+    "John Doe <john.doe@example.com>"
+  ],
+  "langrev": "1",
+  "warnings": [
+    "no-unused"
+  ],
+  // sources compiled
+  "sources": [
+    "./**"
+  ],
+  // libraries to use
+  "libs": [],
+  // c compiler
+  "cc": "cc",
+  // c sources
+  "csources": [
+    "./csource/**"
+  ],
+  "targets": {
+    "hello_world": {
+      "type": "executable",
+    }
+  },
+}