fix getFile and setFile

src/app/plugin/pluginAPI.js

@@ -78,7 +78,7 @@ module.exports = (pluginManager, fileProviders, fileManager, compiler, udapp) =>
         var provider = fileManager.fileProviderOf(path)
         if (provider) {
           // TODO add approval to user for external plugin to get the content of the given `path`
-          provider.get(mod + '/' + path, (error, content) => {
+          provider.get(path, (error, content) => {
             cb(error, content)
           })
         } else {
@@ -89,7 +89,7 @@ module.exports = (pluginManager, fileProviders, fileManager, compiler, udapp) =>
         var provider = fileManager.fileProviderOf(path)
         if (provider) {
           // TODO add approval to user for external plugin to set the content of the given `path`
-          provider.set(mod + '/' + path, content, (error) => {
+          provider.set(path, content, (error) => {
             cb(error)
           })
         } else {