Added pre-publish script

npm run pre-publish will package everything and then
copy your _dist folder to another repo created
near the root of your current working folder
with name <% your component name >.dist

Signed-off-by: NicoArbogast <nicolas.arbogast@gmail.com>
Added pre-publish to readme

Signed-off-by: NicoArbogast <nicolas.arbogast@gmail.com>
Changed name of dist repo (pre-publish script)

Signed-off-by: NicoArbogast <nicolas.arbogast@gmail.com>