Updated cabal plugin with Cabal 1.18 commands.

plugins/cabal/cabal.plugin.zsh

@@ -23,6 +23,7 @@ function _cabal_commands() {
           "copy:Copy teh files into the install locations"
           "configure:Prepare to build the package"
           "fetch:Downloads packages for later installation"
+          "get:Gets a package's source code"
           "haddock:Generate HAddock HTML documentation"
           "help:Help about commands"
           "hscolour:Generate HsColour colourised code, in HTML format"
@@ -31,7 +32,10 @@ function _cabal_commands() {
           "install:Installs a list of packages"
           "list:List packages matching a search string"
           "register:Register this package with the compiler"
+          "repl:Open an interpreter session for the given target"
           "report:Upload build reports to a remote server"
+          "run:Runs the compiled executable"
+          "sandbox:Create/modify/delete a sandbox"
           "sdist:Generate a source distribution file (.tar.gz)"
           "test:Run the test suite, if any (configure with UserHooks)"
           "unpack:Unpacks packages for user inspection"