-Added new gems info
-Added midnight section
-Added gem grape for making RestAPI
-Added curl info
-Added rake tool map
-Added test section with tip about basic authentication
-Added git diff : --diff-filter parameter info
-Added rake task example
-Added rake test section
-Added grape article
-Added curl json request sending
-Added search engine section and Elastic Search info
-Added Ruby gem Tire info
-Added rake command display all tasks
-Refactored maps for Rails migration section
-Added links for alternative key creation in ActiveRecord orm