Get Rid of nobuild, nolink, and alldeps (#2765)

* Removing the nobuild, nolink, and alldeps dependency types in favor of being explicit.
* This will help with maintenance going forward, as adding more dependency types won't affect existing declared dependencies in weird ways.
* default deptype is still `('build', 'link')`

var/spack/repos/builtin/packages/cask/package.py

@@ -41,7 +41,7 @@ class Cask(Package):
     # version 0.8.0 is broken
     version('0.7.4', 'c973a7db43bc980dd83759a5864a1260')
 
-    depends_on('emacs', type=nolink)
+    depends_on('emacs', type=('build', 'run'))
 
     def install(self, spec, prefix):
         mkdirp(prefix.bin)