Added support for directory-level ackrc files

Also updated ackrc

ack/ack.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+# add support for project/directory level .ackrc files
+
+ackrc=""
+if [ -f ./.ackrc ]; then
+    ackrc=$(tr '\n' ' ' < ./.ackrc)
+fi
+
+ack $ackrc $*

ack/ackrc.symlink

@@ -0,0 +1,10 @@
+# General ack Settings
+##########################################################
+
+# only search with case-sensitivity if there is mixed case
+--smart-case
+# follow symlinks
+--follow
+
+# ignore directories
+--ignore-dir=node_modules

ack/aliases.zsh

@@ -0,0 +1 @@
+alias ack="~/.dotfiles/ack/ack.sh"