updated documentation
Merge branch 'master' of https://github.com/mauriceling/dose

# By Clarence Castillo
# Via Clarence Castillo (1) and clarencecastillo (1)
* 'master' of https://github.com/mauriceling/dose:
  Initial commit of example 18
applied dict fixer (2to3) to all codes
applied except  fixer (2to3) to all codes
Merge branch 'master' of https://github.com/mauriceling/dose

Conflicts:
	dose/copads/operations.py
applied has_key fixer (2to3) to all codes
Merge branch 'master' of https://github.com/mauriceling/dose
Merge pull request #78 from clarencecastillo/master

Merge pull request #14 from mauriceling/master
Merge pull request #15 from mauriceling/master

Merge branch 'master' of https://github.com/mauriceling/dose