Add allowable data-selectik override in options


![Screenshot_1_31_13_8_02_PM](https://f.cloud.github.com/assets/170333/116878/61b0d364-6c0b-11e2-97ce-cd88f8c12ea8.png)
![skitch](https://f.cloud.github.com/assets/170333/116879/7055712c-6c0b-11e2-8279-a5e3f275956b.png)

Hi,

I came across the need for this override - here is the use case:

Need formatted line breaks in value ie: < option value="long option" >Long < br / > Option< /option > so that the selectik version shows the html BR..  problem is, on an iOS device, it overrides the text / formatting and show the <br /> as plain text in the selection.

Additionally, if i put the BR in the value, or leave it out, then once an option is selected, it shows condensed in the selected state...  Lastly, if i put the BR in the value, it gets submitted - which i don't want