Moved SWIG code from C++ files (hpp and cxx) to SWIG interface files (.i). Added getter/setter methods for classes with protected or private vars.

src/ttp223/javaupm_ttp223.i

@@ -11,4 +11,13 @@
 
 %include "ttp223.hpp"
 
+#%ignore installISR(mraa::Edge , void *, void *)
+
+%extend upm::TTP223 {
+    void installISR(mraa::Edge level, jobject runnable)
+    {
+      $self->installISR(level, mraa_java_isr_callback, runnable);
+    }
+}
+
 JAVA_JNI_LOADLIBRARY(javaupm_ttp223)