Changes to premiums table UI

#197 

Changes made:
* Showing all rates.
* Changed the title "IBLI_UNIT" to "UNIT". [Requested here](https://github.com/Gizra/IBLI/issues/197#issuecomment-54742195)
* Removed the column "DIVI_WOR". [Requested here](https://github.com/Gizra/IBLI/issues/197#issuecomment-54742195)
* Changed "rate" to "trigger".
* coloured all "15trigger" columns in light yellow.

![selection_029](https://cloud.githubusercontent.com/assets/7369740/4214615/62d378ae-38c5-11e4-8d1a-ff60e0454d3f.png)

@niryariv PR is ready.