Make gradlew executable... I guess

Author: Andre601

build.gradle

@@ -7,7 +7,7 @@ plugins{
 }
 
 group = 'com.andre601'
-version = '2.3.5'
+version = '2.3.6'
 
 sourceCompatibility = targetCompatibility = 1.8
 
@@ -46,8 +46,8 @@ artifacts{
 }
 
 bintray{
-    user = bintrayUser
-    key = bintrayApiKey
+    user = System.getenv("bintrayUser")
+    key = System.getenv("bintrayApiKey")
     publications = ['JavaBotBlockAPIRelease']
     pkg{
         repo = 'maven'