Update Android_Overlayer.yar

Comment not properly closed

Delete duplicated file

Updating index_gen.sh in terms to work correctly on Linux and Mac OS. Updating indices with the lasted added rules

Added SpyNote rule of 5h1vang Issue #149

Added one index per category plus a glonal index. Added bash script to (re)generate indeces. Removed malware/MALW_AdGholas.yar

Android Backdoor rule

Update index.yar

Removed unnecesary import

Removed an include and fixed a typo

Adding a set of yara for Atmos

update ruleset