Add support for preloading modules

See palantir/python-language-server#367

Author: lgeiger

package.json

@@ -162,6 +162,74 @@
             }
           }
         },
+        "preload": {
+          "title": "Preload",
+          "type": "object",
+          "properties": {
+            "enabled": {
+              "title": "Enabled",
+              "type": "boolean",
+              "default": true,
+              "description": "Enable or disable preload."
+            },
+            "modules": {
+              "title": "Modules",
+              "type": "array",
+              "default": [
+                "OpenGL",
+                "PIL",
+                "array",
+                "audioop",
+                "binascii",
+                "cPickle",
+                "cStringIO",
+                "cmath",
+                "collections",
+                "datetime",
+                "errno",
+                "exceptions",
+                "gc",
+                "imageop",
+                "imp",
+                "itertools",
+                "marshal",
+                "math",
+                "matplotlib",
+                "mmap",
+                "mpmath",
+                "msvcrt",
+                "networkx",
+                "nose",
+                "nt",
+                "numpy",
+                "operator",
+                "os",
+                "os.path",
+                "pandas",
+                "parser",
+                "rgbimg",
+                "scipy",
+                "signal",
+                "skimage",
+                "sklearn",
+                "statsmodels",
+                "strop",
+                "sympy",
+                "sys",
+                "thread",
+                "time",
+                "wx",
+                "xxsubtype",
+                "zipimport",
+                "zlib"
+              ],
+              "items": {
+                "type": "string"
+              },
+              "description": "List of modules to import on startup"
+            }
+          }
+        },
         "pycodestyle": {
           "title": "PyCodeStyle",
           "type": "object",