Added the ability to introspect types thourgh the public SBType interface.

Fixed up many API calls to not be "const" as const doesn't mean anything to
most of our lldb::SB objects since they contain a shared pointer, auto_ptr, or
pointer to the types which circumvent the constness anyway.

llvm-svn: 139428

lldb/source/API/SBFrame.cpp

@@ -538,8 +538,8 @@ SBFrame::get() const
     return m_opaque_sp.get();
 }
 
-const lldb::StackFrameSP &
-SBFrame::get_sp() const
+lldb::StackFrameSP &
+SBFrame::get_sp()
 {
     return m_opaque_sp;
 }