Add more info to readme

Author: Tomislav Marinkovic

README.md

@@ -1 +1,14 @@
-# algorithms-and-data-structures
+# Algorithms and data structures
+This project contains some of known algorithms and data structures implemented in Java. 
+It also measure time needed to run on different input sizes and estimates time complexity/
+## Content
+* Sort
+    * Insertion Sort
+    * Merge Sort
+    * Bubble Sort
+    
+## Run
+Each type of algorithms (e.g sort) has Executor class that runs all the algorithms and measure time complexity.
+## Tests
+Each algorithm has one basic test to validate algorithm works as expected.
+