rename <application> to <call>

rename <application> to <call>

* doc/ref/compiler.texi (The Scheme Compiler): Update docs.

* libguile/expand.h:
* libguile/expand.c:
* module/language/tree-il.scm: Rename <application> to <call>.  Change
  the external representation from (apply proc arg ...) to (call proc
  arg ...).

* libguile/memoize.c:
* module/ice-9/psyntax-pp.scm:
* module/ice-9/psyntax.scm:
* module/language/brainfuck/compile-tree-il.scm:
* module/language/ecmascript/compile-tree-il.scm:
* module/language/elisp/compile-tree-il.scm:
* module/language/tree-il/analyze.scm:
* module/language/tree-il/compile-glil.scm:
* module/language/tree-il/fix-letrec.scm:
* module/language/tree-il/inline.scm:
* module/language/tree-il/primitives.scm:
* test-suite/tests/tree-il.test: Update all callers.