Feature: Add right-justified percentages - Closes #77
Chore: Version bump in Gemfile.lock
Merge branch 'feature/justified-percentage'
Bugfix: Percentage formatter failed when total was 0 or unknown

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Github Issue URLs:
  * https://github.com/jfelchner/ruby-progressbar/issues/75
Actions:
  * Closes #75
Branch:        bug/fix-percentage-formatter-when-total-is-unknown
Signed-off-by: Jeff Felchner <accounts+git@thekompanee.com>
Merge branch 'bug/fix-percentage-formatter-when-total-is-unknown-closes-75'
Chore: Add JSCS config file
Feature: Update JSHint config with our custom version
Feature: Add SCSS lint configuration
Ensure output_string is not nil, which may happen for non-TTY output.
String[start,length] may return nil if the initial index falls outside the strength or the length is negative.