prepares release 3.1.0 (#409)

Author: uklimaschewski

README.md

@@ -57,7 +57,7 @@ To include it in your Maven project, add the dependency to your pom. For example
     <dependency>
       <groupId>com.ezylang</groupId>
       <artifactId>EvalEx</artifactId>
-      <version>3.0.5</version>
+      <version>3.1.0</version>
     </dependency>
 </dependencies>
 ```
@@ -68,7 +68,7 @@ If you're using gradle add the dependencies to your project's app build.gradle:
 
 ```gradle
 dependencies {
-    compile 'com.ezylang:EvalEx:3.0.5'
+    compile 'com.ezylang:EvalEx:3.1.0'
 }
 ```
 

docs/index.md

@@ -51,7 +51,7 @@ To include it in your Maven project, add the dependency to your pom. For example
     <dependency>
       <groupId>com.ezylang</groupId>
       <artifactId>EvalEx</artifactId>
-      <version>3.0.5</version>
+      <version>3.1.0</version>
     </dependency>
 </dependencies>
 ```
@@ -62,7 +62,7 @@ If you're using gradle add the dependencies to your project's app build.gradle:
 
 ```gradle
 dependencies {
-    compile 'com.ezylang:EvalEx:3.0.5'
+    compile 'com.ezylang:EvalEx:3.1.0'
 }
 ```
 

pom.xml

@@ -5,7 +5,7 @@
 
   <groupId>com.ezylang</groupId>
   <artifactId>EvalEx</artifactId>
-  <version>3.1.0-SNAPSHOT</version>
+  <version>3.1.0</version>
 
   <name>EvalEx</name>