Add hgcompile script and fix INSTALL document

Added hgcompile script (just a copy of cvscompile), and
fixed INSTALL document about HG.

INSTALL

@@ -11,11 +11,11 @@ For installation you can use these commands:
 	make install
 
 
-Compilation from CVS sources
-----------------------------
+Compilation from HG sources
+---------------------------
 
 You need also GNU packages automake and libtool installed in your system
-to compile CVS sources of alsa-lib package.
+to compile HG (Mercurial) sources of alsa-lib package.
 
 For compilation you can use these commands:
 
@@ -27,7 +27,7 @@ For compilation you can use these commands:
 	./configure
 	make
 
-The included cvscompile script does this job for you.
+The included hgcompile script does this job for you.
 
 Note: Some automake packages have missing aclocal program. Use newer version
       in the case.

Makefile.am

@@ -6,7 +6,7 @@ if BUILD_MIXER
 SUBDIRS += alsalisp
 endif
 SUBDIRS += test utils
-EXTRA_DIST=ChangeLog INSTALL TODO NOTES configure cvscompile libtool depcomp version MEMORY-LEAK
+EXTRA_DIST=ChangeLog INSTALL TODO NOTES configure hgcompile libtool depcomp version MEMORY-LEAK
 AUTOMAKE_OPTIONS=foreign
 
 INCLUDES=-I$(top_srcdir)/include

hgcompile

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+touch ltconfig
+libtoolize --force --copy --automake
+aclocal $ACLOCAL_FLAGS
+autoheader
+automake --foreign --copy --add-missing
+touch depcomp		# seems to be missing for old automake
+autoconf
+export CFLAGS='-O2 -Wall -W -pipe -g'
+echo "CFLAGS=$CFLAGS"
+echo "./configure $@"
+./configure $@ || exit 1
+unset CFLAGS
+if [ -z "$HGCOMPILE_NO_MAKE" ]; then
+  make
+fi