Update 12-ParallelExecution.md

Fix some small issues with in code examples
Merge pull request #1576 from zmilan/patch-1

Update 12-ParallelExecution.md
Update 12-ParallelExecution.md
Merge pull request #1579 from ajo-silent/patch-1

Update 12-ParallelExecution.md
Add missing quote in example
Update .travis.yml
capital_P_dangit
Merge pull request #1582 from xwp/feature/capital_P_dangit

capital_P_dangit
Merge pull request #1580 from drewhammond/patch-1

Add missing quote in example
Update README.md
Fixed spelling error
Merge pull request #1586 from leepownall/patch-1

[skip ci] Fixed spelling error
Remove table constraints prior to drop table in clean up
Removing empty condition in proceedSeeInField

Mistakenly had an empty condition in there
Merge pull request #1588 from zbateson/seeInField-remove-empty-cond

Removing empty condition in proceedSeeInField
Merge pull request #1589 from rgeraads/2.0

Improved spelling & grammar on chapters 1, 2 & 3
Merge pull request #1587 from jonsa/bugfix_remove_constraint_sqlsrv

Remove table constraints prior to drop table in clean up in the SqlSrv driver