use Cask to manage deps

.travis.yml

@@ -12,6 +12,9 @@ before_install:
       sudo apt-get install -qq
           emacs24 emacs24-el emacs24-common-non-dfsg;
     fi
+  - curl -fsSL https://raw.githubusercontent.com/cask/cask/master/go | python
+  - ./.cask/bin/cask
+
 env:
   - EMACS=emacs24 TAGS="--tags ~@requires-e24-3"
   - EMACS=emacs-snapshot TAGS=""

Cask

@@ -0,0 +1,5 @@
+(source gnu)
+;(source melpa)
+
+(development
+ (depends-on "async"))

tests/run-test.el

@@ -23,6 +23,13 @@
             flx-root-dir))
 
 
+;; Cask
+(setq package-user-dir
+      (expand-file-name (format "~/.cask/%s/elpa" emacs-version)))
+(package-initialize)
+
+
+
 ;; Use ERT from github when this Emacs does not have it
 (unless (locate-library "ert")
   (add-to-list