Merge tag '1.0.1' into develop

1.0.1
Debug mode added
Documentation of debug mode
Merge branch 'master' of https://github.com/phortx/gem-steps into feature/debug_mode
provide debugging option for steps

  - Provides error backtraces
  - inherited by nested steps
update changelog and readme
Merge branch 'feature/debug_mode' into develop
exclude SystemExit's from debug output
support multi-line report's
update changelog
remove debug require and force a string
fix bug when retrieve called as first output of step

Fixes #5
update CHANGELOG
Version bump to 1.1.0
update gemspec
update CHANGELOG
Merge branch 'release/1.1.0'