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/py-bottleneck/package.py

@@ -33,7 +33,7 @@ class PyBottleneck(Package):
     version('1.0.0', '380fa6f275bd24f27e7cf0e0d752f5d2')
 
     extends('python')
-    depends_on('py-numpy', type=nolink)
+    depends_on('py-numpy', type=('build', 'run'))
 
     def install(self, spec, prefix):
         setup_py('install', '--prefix=%s' % prefix)