Allow versions to be prepended with a `v`

Bug fix release to allow v to appear at the beginning of chart versions, which is what I believe helm allows. Should fix #8.

Fix bugs, add global helm options

• Fix #3
• Fix #6
• Add all global options for helm to provider block
• Make sure they're used everywhere where they are relevant

Add `tiller_namespace`

0.3.0

Add `tiller_namespace`

Improve `helm upgrade` error information

This release ensures that helm upgrade command has the entire commandline printed out so that when an error happens it can be debugged easier.

Initial Release

Expect bugs, but I wanted to release a straight forward helm provider, so here it is.