broadway: Use zlib compression for broadway buffers

This imports the MIT licensed js unzip from:
https://github.com/imaya/zlib.js

and uses it to decompress in js on the client side.

gdk/broadway/toarray.pl

@@ -1,15 +1,17 @@
 #!/usr/bin/perl -w
 
-my $FILENAME = $ARGV[0];
+my $ARRAYNAME = $ARGV[0];
+print "static const char $ARRAYNAME\[\] = \"";
 
-open FILE, $FILENAME or die "Cannot open $FILENAME";
-
-my $ARRAYNAME = $ARGV[1];
-print "static const char $ARRAYNAME\[\] =";
-while (<FILE>) {
-    s@\\@\\\\@g;
-    s@"@\\"@g;
-    chomp ($_);
-    print "\n  \"$_\\n\"";
+for ($i = 1; $i <= $#ARGV; $i = $i + 1) {
+    my $FILENAME = $ARGV[$i];
+    open FILE, $FILENAME or die "Cannot open $FILENAME";
+    while (my $line = <FILE>) {
+        foreach my $c (split //, $line) {
+            printf ("\\x%02x", ord ($c));
+        }
+    }
 }
-print ";\n";
+
+print "\";\n";
+