Added documentation for many of our python properties and also made the property help show up by declaring the properties correctly. We previosly declared properties into a local "x" variable, what I didn't realize is that the help will use this as the property name for the help output.

llvm-svn: 159468
diff --git a/lldb/scripts/Python/interface/SBInstructionList.i b/lldb/scripts/Python/interface/SBInstructionList.i
index 9f4a1b0..32603be 100644
--- a/lldb/scripts/Python/interface/SBInstructionList.i
+++ b/lldb/scripts/Python/interface/SBInstructionList.i
@@ -65,7 +65,7 @@
             return int(self.GetSize())
 
         def __getitem__(self, key):
-            '''Access instructions by integer index.'''
+            '''Access instructions by integer index for array access or by lldb.SBAddress to find an instruction that matches a section offset address object.'''
             if type(key) is int:
                 # Find an instruction by index
                 if key < len(self):