Use print shiv instead of standard shiv

Print shiv also applies the shivs for printing...
Merge pull request #157 from mvrhov/patch-1

Use print shiv instead of standard shiv
Updated README
Set style using FormBuilder

Fixes #161
Merge branch 'develop' of github.com:braincrafted/bootstrap-bundle into develop

* 'develop' of github.com:braincrafted/bootstrap-bundle:
  Updated README
  Use print shiv instead of standard shiv
  Passing the error params to the form_errors trans call
Option to disable dropdown.

Fixes #162
Fix #162
Second attempt Fix #162
Merge pull request #163 from hyperunknown/patch-162

Fix #162
Correction of PHPDoc for badgeFunction
Merge pull request #164 from hyperunknown/patch-phpdoc-badge-extension

Correction of PHPDoc for badgeFunction
Set correct default value for label_col

See https://github.com/braincrafted/bootstrap-bundle/issues/148
Merge pull request #165 from dirkluijk/patch-1

Set correct default value for label_col
Fix setting style on subform.

Finally fix #161
Merge branch 'develop' of github.com:braincrafted/bootstrap-bundle into develop

* 'develop' of github.com:braincrafted/bootstrap-bundle:
  Set correct default value for label_col
  Correction of PHPDoc for badgeFunction
  Second attempt Fix #162
  Fix #162
Fixed bug with undefinied style attribute
Update README for 2.0.0-stable
When trying to render form with `file` element in it, there is an error:

    Variable "type" does not exist in /home/hsz/projects/MyProject/vendor/braincrafted/bootstrap-bundle/Braincrafted/Bundle/BootstrapBundle/Resources/views/Form/bootstrap.html.twig at line 159

`file_widget` block uses `type` variable, which does not exist. However we can hardcode it to `file` because we are generating `input[type=file]`.
Merge branch 'develop' of github.com:hsz/bootstrap-bundle into hsz-develop

* 'develop' of github.com:hsz/bootstrap-bundle:
  When trying to render form with `file` element in it, there is an error:
[Proposal] Allow HTML in input Prepend

Currently the only thing you can prepend or append to fields is plain text, since any HTML is escaped once its printed by twig.

This does not allow us to use icons in prepends and appends, which is totally supported by bootstrap by adding the html: `<i class="icon-class"></i>`

Adding a `|raw` does the trick. As far as i can forsee it will not break anything else, unless someone is passing in `<html>` and expecting to see that as text. Using escape chars would do the trick in that case.

Is this a good solution? Or would you rather we add a 'raw' option that can cause `|raw` to be added or not?