Transform exact `style` tags from *markdown* generated to equivalent *bootstrap* `class` for tables

* Allows alignment of tables to be specified with GFM.
* Briefly mentioned at https://github.com/OpenUserJs/OpenUserJS.org/issues/221#issue-36650026
Missed semicolons for #363
Merge pull request #363 from Martii/proposedGFMTableTransform

Transform exact `style` tags from *markdown* generated to equivalent *bootstrap* `class` for tables

> Any comments or concerns?

Going, going, gone... auto-merge