Fixed bugs in the installer:

- Bytecompilation run twice
- Bash style string concat that doesn't work with sh.
- Default path was \$HOME instead of the users homedir ('' vs "").

utils/installer.sh

@@ -122,8 +122,8 @@ done
 
 VERBOSE_COLOR=$BBLUE
 
-[ -z $PRELUDE_URL ] && PRELUDE_URL='https://github.com/bbatsov/prelude.git'
-[ -z $PRELUDE_INSTALL_DIR ] && PRELUDE_INSTALL_DIR='$HOME/.emacs.d'
+[ -z $PRELUDE_URL ] && PRELUDE_URL="https://github.com/bbatsov/prelude.git"
+[ -z $PRELUDE_INSTALL_DIR ] && PRELUDE_INSTALL_DIR="$HOME/.emacs.d"
 
 if [ x$PRELUDE_VERBOSE != x ]
 then
@@ -192,7 +192,7 @@ then
     if [ -n $PRELUDE_INTO ]
     then
 	# Install into existing config
-        PRELUDE_INSTALL_DIR+='/prelude'
+	PRELUDE_INSTALL_DIR=$PRELUDE_INSTALL_DIR"/prelude"
 	install_prelude
     else
 	# Replace existing config
@@ -221,7 +221,6 @@ then
 	if [ x$PRELUDE_VERBOSE != x ]
 	then
 	    emacs -batch -f batch-byte-compile $PRELUDE_INSTALL_DIR/prelude/*.el
-            emacs -batch -f batch-byte-compile "$PRELUDE_INSTALL_DIR/prelude/*.el"
 	else
 	    emacs -batch -f batch-byte-compile $PRELUDE_INSTALL_DIR/prelude/*.el > /dev/null 2>&1
 	fi