move also the whole python initialization away from plugin.vim

autoload/jedi.vim

@@ -168,12 +168,6 @@ function! jedi#_vim_exceptions(str, is_eval)
     return l:result
 endfunction
 
-if has('python')
-    command! -nargs=1 Python python <args>
-else
-    command! -nargs=1 Python python3 <args>
-end
-
 " ------------------------------------------------------------------------
 " deprecations
 " ------------------------------------------------------------------------
@@ -226,6 +220,21 @@ for [key, val] in items(s:settings)
 endfor
 
 
+" ------------------------------------------------------------------------
+" Python initialization
+" ------------------------------------------------------------------------
+
+if has('python')
+    command! -nargs=1 Python python <args>
+elseif has('python3')
+    command! -nargs=1 Python python3 <args>
+else
+    if !exists("g:jedi#squelch_py_warning")
+        echomsg "Error: Required vim compiled with +python"
+    endif
+    finish
+end
+
 Python << PYTHONEOF
 """ here we initialize the jedi stuff """
 import vim

plugin/jedi.vim

@@ -1,28 +1,13 @@
 "jedi.vim - Omni Completion for python in vim
 " Maintainer: David Halter <davidhalter88@gmail.com>
 "
-" This part of the software is just the vim interface. The main source code
-" lies in the python files around it.
-
-if !has('python') && !has('python3')
-    if !exists("g:jedi#squelch_py_warning")
-        echomsg "Error: Required vim compiled with +python"
-    endif
-    finish
-endif
-
-" load plugin only once
-if exists("g:loaded_jedi") || &cp
-    finish
-endif
-let g:loaded_jedi = 1
-
+" This part of the software is just the vim interface. The really big deal is
+" the Jedi Python library.
 
 if g:jedi#auto_vim_configuration
     filetype plugin on
 endif
 
-
 " ------------------------------------------------------------------------
 " PyImport command
 " ------------------------------------------------------------------------