removes per user-system template-engine configuration

This was already broken, so instead allow to configure the engine
globally (delegated to the fos_user)
Merge pull request #50 from rollerworks/hotfix-template-engine

This PR was merged into rollerworks:master branch.

Discussion
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Remove per user-system template-engine configuration

                     
|Q            |A    |
|---          |---  |
|Bug Fix?     |yes  |
|New Feature? |no   |
|BC Breaks?   |yes  |
|Deprecations?|no   |
|Tests Pass?  |yes  |
|Fixed Tickets|GH-49|
|License      |MIT  |
|Doc PR       |     |
                     
This removes per user-system template-engine configuration.
Which was already broken, so instead allow to configure the engine globally (delegated to the fos_user)

Providing per user-system template-engine would require to much work for to little benefit.

Commits
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75334fb02317366562ed8ebbcd3c9a2c5ff7de61 removes per user-system template-engine configuration

This was already broken, so instead allow to configure the engine
globally (delegated to the fos_user) sstok