Extension Mechanism Cleanup

- Cleaned up existing extension debris, in anticipation of the new mechanisms to
  be included in future releases.  This includes install/uninstall and a full
  set of triggers.

INSTALL

@@ -12,9 +12,6 @@ from source.
 
 More information on cmake can be obtained at http://cmake.org
 
-Optionally, you might want to have Lua installed, if you wish to write plugins
-and modify taskwarrior.
-
 
 Basic Installation
 ------------------
@@ -125,11 +122,6 @@ Cygwin
   again, or reinstall Cygwin under your normal Windows login.
 
 
-Darwin
-  If you're having trouble with Lua, check to see if the include files were
-  installed. If you're using fink, this will require the lua51-dev package in
-  addition to lua51.
-
 Darwin, 32bit
   The taskwarrior packages will not work on a 32-bit OSX installation on Core
   Duo hardware.  You will need to build Taskwarrior from source, and use this
@@ -147,7 +139,7 @@ Darwin, 32bit
 Troubleshooting
 ---------------
 
-If you've recently made changes to dependencies (by reinstalling Lua, for
+If you've recently made changes to dependencies (by reinstalling libuuid, for
 example) be sure to rerun 'cmake .' before trying to execute 'make' again.
 
 CMake will run and locate all the necessary pieces for the build, and create