Relax the installation folder requirement.
Relax the installation folder requirement.

Remove the check that was guarding against trying to install thali into a
non-supported folder.

This is done to allow the flexibility needed at thaliproject/postcardapp#85.

thaliproject/Thali_CordovaPlugin,thaliproject/Thali_CordovaPlugin,thaliproject/Thali_CordovaPlugin,thaliproject/Thali_CordovaPlugin,thaliproject/Thali_CordovaPlugin