Remove camel case from imageuploadtype in config

This removes the only camel cased option of the config options
**we** added to the config.json.

In auth provider's config parts are a lot of camel cased options
provided. We shouldn't touch them to keep them as similar as
possible to the examples.

Fixes #315

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

lib/config/index.js

@@ -13,6 +13,7 @@ const debugConfig = {
   debug: (env === Environment.development)
 }
 
+// Get version string from package.json
 const {version} = require(path.join(appRootPath, 'package.json'))
 
 const packageConfig = {
@@ -20,7 +21,7 @@ const packageConfig = {
   minimumCompatibleVersion: '0.5.0'
 }
 
-const configFilePath = path.join(__dirname, '../../config.json')
+const configFilePath = path.join(appRootPath, 'config.json')
 const fileConfig = fs.existsSync(configFilePath) ? require(configFilePath)[env] : undefined
 
 let config = require('./default')
@@ -97,8 +98,13 @@ config.isLDAPEnable = config.ldap.url
 config.isSAMLEnable = config.saml.idpSsoUrl
 config.isPDFExportEnable = config.allowpdfexport
 
+// merge legacy values
+if (config.imageUploadType && !config.imageuploadtype) {
+  config.imageuploadtype = config.imageUploadType
+}
+
 // figure out mime types for image uploads
-switch (config.imageUploadType) {
+switch (config.imageuploadtype) {
   case 'imgur':
     config.allowedUploadMimeTypes = [
       'image/jpeg',