Using JUnit assert as base interface

Updated .gitignore file, remove ignored files

Author: alekseikurnosenko

.gitignore

@@ -1,6 +1,16 @@
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Windows thumbnail db
+Thumbs.db
+
+# Android Studio
+*.iml
+.idea
 .gradle
-/local.properties
-/.idea/workspace.xml
-/.idea/libraries
-.DS_Store
-/build
+build/
+
+# gradle wrapper
+gradle
+gradlew
+gradlew.bat