add option to disable automatic server recompilation

fix #400

Author: artur-shaik

README.md

@@ -200,11 +200,13 @@ let g:JavaComplete_EnableDefaultMappings = 0
 
 `let g:JavaComplete_CustomTemplateDirectory = '~/jc_templates'` - set directory that contains custom templates, for class creation. By default this options is null.
 
-`let g:JavaComplete_AutoStartServer = 0` - Disable automatic startup of server
+`let g:JavaComplete_AutoStartServer = 0` - Disable automatic startup of server.
 
 `let g:JavaComplete_CompletionResultSort = 1` - Sort completion results alphabetically.
 
-`let g:JavaComplete_IgnoreErrorMsg = 1` When it is greater than 0, the error message will be ignored. By default it is 0.
+`let g:JavaComplete_IgnoreErrorMsg = 1` - When it is greater than 0, the error message will be ignored. By default it is 0.
+
+`let g:JavaComplete_CheckServerVersionAtStartup = 0` - Check server version on startup. Can be disabled on slow start, or infinite recompilation. By default it is 1.
 
 ## Commands
 

autoload/javacomplete/server.vim

@@ -87,7 +87,9 @@ endfunction
 
 function! javacomplete#server#Start()
   if s:Poll() == 0 && s:serverStartBlocked == 0
-    call s:ControlServerAppVersion()
+    if get(g:, 'JavaComplete_CheckServerVersionAtStartup', 1)
+      call s:ControlServerAppVersion()
+    endif
 
     JavacompletePy import vim
     let file = g:JavaComplete_Home. g:FILE_SEP. "autoload". g:FILE_SEP. "javavibridge.py"

doc/javacomplete.txt

@@ -352,6 +352,12 @@ A single letter indicates the kind of compeltion item. These kinds are:
         let g:JavaComplete_IgnoreErrorMsg = 1
         By default this options is 0.
 
+    Check server version on startup. Can be disabled on slow start, or
+    infinite recompilation:
+
+        let g:JavaComplete_CheckServerVersionAtStartup = 0
+        By default this options is 1.
+
 
 2.4 Commands					*javacomplete-commands*