Added git ignore

Author: gsssrao

.gitignore

@@ -0,0 +1,42 @@
+# Built application files
+*.apk
+*.ap_
+
+# Files for the Dalvik VM
+*.dex
+
+# Java class files
+*.class
+
+# Generated files
+bin/
+gen/
+
+# Gradle files
+.gradle/
+build/
+/*/build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Proguard folder generated by Eclipse
+proguard/
+
+# Log Files
+*.log
+
+# Apple and windows thumbnails
+.DS_Store
+.DS_Store?
+Thumbs.db
+
+# Many other OS generated files
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+
+# Every developer will have OpenCV sdk installed in their own path
+project.properties
+