Rename -e to -i and introduce new argument for -e
Rename -e to -i and introduce new argument for -e

Some people (like the VIRT team) only care about epics, not initiatives
not stories.  Let's make this a bit more intuitive.

Signed-off-by: Christoffer Dall <2c58c35362f9f538b58fc30c0db0d1c81cf60d96@linaro.org>

jbech-linaro/jipdate