Code Cleanup

- Integrated Context.config.
- Eliminated Config& as a function argument.
- Added extern references to Context where needed.

src/tests/autocomplete.t.cpp

@@ -29,6 +29,8 @@
 #include <util.h>
 #include <task.h>
 
+Context context;
+
 ////////////////////////////////////////////////////////////////////////////////
 int main (int argc, char** argv)
 {