Add new Phoenix tasks, mostly included in the 1.3.0 release

src/_mix

@@ -95,6 +95,8 @@ _1st_arguments=(
     'loadconfig:Loads and persists the given configuration'
     'local:Lists local tasks'
     'local.hex:Installs Hex locally'
+    'local.phoenix:Updates Phoenix locally'
+    'local.phx:Updates the Phoenix project generator locally'
     'local.public_keys:Manages public keys'
     'local.rebar:Installs Rebar locally'
     'new:Creates a new Elixir project'
@@ -109,6 +111,9 @@ _1st_arguments=(
     'phx.gen.presence:Generates a Presence tracker'
     'phx.gen.schema:Generates an Ecto schema and migration file'
     'phx.gen.secret:Generates a secret'
+    'phx.new:Creates a new Phoenix application'
+    'phx.new.ecto:Creates a new Ecto project within an umbrella project'
+    'phx.new.web:Creates a new Phoenix web project within an umbrella project'
     'phx.routes:Prints all routes'
     'phx.server:Starts applications and their servers'
     'profile.fprof:Profiles the given file or expression with fprof'