Added demo-examples and assignments related to control_statements and few data structures in ruby.
Merge pull request #18 from kgaikwad/day_2

Added demo-examples and assignments related to control_statements and fe...
Updated Day2 assignments
Merge remote-tracking branch 'upstream/master'
Added day2 extra assignments
Renamed file from txt to rb
Done array assignment
Merge remote-tracking branch 'upstream/master'
Improved day1 assignments
Completed day2 assignments