Merge branch 'release/1.6.1' into develop

* release/1.6.1:
  fix test
  downgrade version of prawn because of this issue https://github.com/prawnpdf/prawn/issues/734
edit .gitignore
fix bug with another days
Merge branch 'release/v1.6.1'

* release/v1.6.1:
  fix bug with another days
  edit .gitignore