fix for #237

When the first job for the job was deleted and there is only one job (latest?)
in the build, get_job() API fail with TypeError.

This commit fixes this issue.
  https://github.com/salimfadhley/jenkinsapi/issues/237
Merge pull request #238 from bhuvaneswaran/stories/237

fix for #237
logging fix for invalid response
fixing pylint failure
Merge pull request #239 from rocktavious/login_fix

logging fix for invalid response
Version bump
Remove inactive developers from the main PROJECT_AUTHORS.
Move @lechat up the list since he's the most active maintainer
Adding method to expose /computer/api/python

 - allows one to query totalExecutors and busyExecutors on a master
 - tests included, both unit and sys
removing debug message
Merge pull request #241 from makewhatis/master

Adding a method to expose /computer/api/python