Add UTF encoding header to HookRunner

We're only adding this to this file since it is the only file that
attempts to use UTF-8 characters in its code. We may at some point add
this to all other files, but for now this allows the build to pass on
Ruby 1.9.3.

Change-Id: I4bf3694d85885c9df07a31d9c33c3ad37ee84aaa
Reviewed-on: http://gerrit.causes.com/35644
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>
Add .bundle directory to .gitignore

Some versions of Ruby create this (2.1.0, and 1.9.3) and some don't.

Add it to the `.gitignore` file.

Change-Id: I13a0216530a247cb91d8ec6b24f75f69953c9b2f
Reviewed-on: http://gerrit.causes.com/35645
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>