Update README.md

useful info about branches flow

Author: SimonHarmonicMinor

README.md

@@ -1,3 +1,5 @@
+`master` branch shows the last relevant release. If you want to see the newest changes, check out `develop` branch. 
+
 # Java Useful Utils
 Just some useful classes for everyday coding that might make your code shorter and cleaner
 
@@ -312,4 +314,4 @@ return biggest.getValue();
 Also lib has implementations for each primitive type.
 `MutableInt`, `MutableDouble`, `MutableShort`,
 `MutableLong`, `MutableFloat`, `MutableChar`,
-`MutableByte`, `MutableBoolean`.
+`MutableByte`, `MutableBoolean`.