Proposing a PR to fix a few small typos

[timgates42]

Issue Type

[x] Bug (Typo)

Steps to Replicate and Expected Behaviour

• Examine test/test_jobs/init.py, test/test_jobs/test_delete_inactive_accounts.py, test/test_jobs/test_engage_old_users.py and observe substract, however expect to see subtract.
• Examine test/test_newsletter.py and observe subcribe, however expect to see subscribe.
• Examine cli.py, pybossa/cache/project_stats.py and observe miliseconds, however expect to see milliseconds.
• Examine pybossa/themes/README.md and observe simbolic, however expect to see symbolic.
• Examine pybossa/newsletter/init.py and observe subscibed, however expect to see subscribed.
• Examine test/test_ckan.py and observe resourece, however expect to see resource.
• Examine pybossa/importers/flickr.py and observe remainin, however expect to see remaining.
• Examine cli.py and observe placehoder, however expect to see placeholder.
• Examine test/test_jobs/test_news.py and observe notificaton, however expect to see notification.
• Examine pybossa/model/page.py and observe headles, however expect to see headless.
• Examine test/test_repository/test_result_repository.py and observe delte, however expect to see delete.
• Examine test/test_auditlog.py and observe avaliable, however expect to see available.
• Examine pybossa/repositories/init.py and observe apropriate, however expect to see appropriate.

Notes

Semi-automated issue generated by
https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md

To avoid wasting CI processing resources a branch with the fix has been
prepared but a pull request has not yet been created. A pull request fixing
the issue can be prepared from the link below, feel free to create it or
request @timgates42 create the PR. Alternatively if the fix is undesired please
close the issue with a small comment about the reasoning.

https://github.com/timgates42/pybossa/pull/new/bugfix_typos

Thanks.