Merge pull request #5 from AmmarCSE/master

remove log file in root

remove unintentionally added log files

fix lint errors

fix runtime errors

fix build errors

add source files and do direct translation to es6 for ch7, q2

Merge pull request #1 from AmmarCSE/master

resolve lint errors(except console statement errors)

move solution 1 to its own directory

solution to chapter 7, question 1

added chapter 7 directory

Added solution to ch4-9 and associated tests.

Added solution to ch4-11 and associated tests.

Added solution to ch2-8 and associated tests. Update ch2 helpers and made use of new methods in ch2-7 tests.