Merge pull request #18 from robinetmiller/simplifications

Merge pull request #17 from robinetmiller/merge_functions_and_booleans_pr

Fixed reference to for loops in slides

Corrected comment prompt in ex3

Replaced broken gif link on questions slide.

Removed broken resource link

Renamed hello.rb to ex1_hello.rb

Fixed exercise 3 solution

Renamed functions to methods in slides because functions don't exist in Ruby - everything is methods

Fixed ie vs eg grammatical error

Replaced all instances of string single quotes with double string quotes in slides

Replaced for X in Y loop style with standard Ruby iterator style

Replaced calls to print with puts

Replaced block comments with standard comments to conform to Rubocop standard as well as for readability for learners

Made all String literals use double quotes for consistency with slides.