Git repo npmization: Do not use @VERSION

When the Git repository will be a npm package, there will be no
preprocessing step and thus no @VERSION substitution. Let's get rid of
it.

Part of a fix for GH-32.

Makefile

@@ -54,19 +54,12 @@ PREPROCESS=perl -e '                                                           \
                                                                                \
   use File::Basename;                                                          \
                                                                                \
-  open(my $$f, "$(VERSION_FILE)") or die "Can\x27t open $(VERSION_FILE): $$!"; \
-  my $$PEGJS_VERSION = <$$f>;                                                  \
-  close($$f);                                                                  \
-  chomp($$PEGJS_VERSION);                                                      \
-                                                                               \
   sub preprocess {                                                             \
     my $$file = shift;                                                         \
     my $$output = "";                                                          \
                                                                                \
     open(my $$f, $$file) or die "Can\x27t open $$file: $$!";                   \
     while(<$$f>) {                                                             \
-      s/\@VERSION/$$PEGJS_VERSION/g;                                           \
-                                                                               \
       if (/^\s*\/\/\s*\@include\s*"([^"]*)"\s*$$/) {                           \
         $$output .= preprocess(dirname($$file) . "/" . $$1);                   \
         next;                                                                  \

src/compiler/passes/generate-code.js

@@ -268,7 +268,7 @@ PEG.compiler.passes.generateCode = function(ast, options) {
           grammar: [
             '(function(){',
             '  /*',
-            '   * Generated by PEG.js @VERSION.',
+            '   * Generated by PEG.js 0.7.0.',
             '   *',
             '   * http://pegjs.majda.cz/',
             '   */',

src/peg.js

@@ -1,5 +1,5 @@
 /*
- * PEG.js @VERSION
+ * PEG.js 0.7.0
  *
  * http://pegjs.majda.cz/
  *
@@ -12,7 +12,7 @@ var PEG = (function(undefined) {
 
 var PEG = {
   /* PEG.js version (uses semantic versioning). */
-  VERSION: "@VERSION",
+  VERSION: "0.7.0",
 
   /*
    * Generates a parser from a specified grammar and returns it.