tree-il -> glil compiler works now, at least in initial tests

* module/language/tree-il/analyze.scm: Break analyzer out into its own
  file.

* module/language/tree-il/compile-glil.scm: Port the GHIL->GLIL compiler
  over to work on tree-il. Works, but still misses a number of important
  optimizations.

* module/language/tree-il.scm: Add <void>. Not used quite yet.

* module/language/glil.scm: Remove <glil-argument>, as it is the same as
  <glil-local> (minus an offset).

* module/language/glil/compile-assembly.scm:
* module/language/glil/decompile-assembly.scm:
* module/language/ghil/compile-glil.scm: Adapt for <glil-argument>
* removal.

* module/Makefile.am (TREE_IL_LANG_SOURCES): Reorder, and add
  analyze.scm.

module/language/glil.scm

@@ -44,9 +44,6 @@
    <glil-const> make-glil-const glil-const?
    glil-const-obj
 
-   <glil-argument> make-glil-argument glil-argument?
-   glil-argument-op glil-argument-index
-
    <glil-local> make-glil-local glil-local?
    glil-local-op glil-local-index
 
@@ -87,7 +84,6 @@
   (<glil-void>)
   (<glil-const> obj)
   ;; Variables
-  (<glil-argument> op index)
   (<glil-local> op index)
   (<glil-external> op depth index)
   (<glil-toplevel> op name)
@@ -125,7 +121,6 @@
     ((source ,props) (make-glil-source props))
     ((void) (make-glil-void))
     ((const ,obj) (make-glil-const obj))
-    ((argument ,op ,index) (make-glil-argument op index))
     ((local ,op ,index) (make-glil-local op index))
     ((external ,op ,depth ,index) (make-glil-external op depth index))
     ((toplevel ,op ,name) (make-glil-toplevel op name))
@@ -150,8 +145,6 @@
     ((<glil-void>) `(void))
     ((<glil-const> obj) `(const ,obj))
     ;; variables
-    ((<glil-argument> op index)
-     `(argument ,op ,index))
     ((<glil-local> op index)
      `(local ,op ,index))
     ((<glil-external> op depth index)