Hard coded id in XML layout

[tundebabzy]

mTv = (TextView) findViewById(R.id.expandable_text);
mButton = (ImageButton) findViewById(R.id.expand_collapse);

These lines in findViews mean that the id for the children of ExpandableTextView must be expandable_text and expandand_collapse for the TextView and ImageButton respectively.

I initially changed the ids in my XML layout and slammed into a null-pointer exception until i dug into the code. It will nice if this "limitation" is made known to users or better still, remove the hard coded ids. I can submit a pull request to remove the hard coded ids.

[Manabu-GT]

It will nice if this "limitation" is made known to users or better still, remove the hard coded ids.
-> sorry for confusion, I will clarify that fact on the README.

[Manabu-GT]

README just updated to mention this limitation.