Automatically build jar and deploy to jetbrains repository

Hi,

I would like to build Jar and deploy it directly from travis.

@UFOMelkor @fonsecas72 What do you think about these [upload-plugin.sh](https://github.com/MoreUnit/org.moreunit.intellij.plugin/blob/master/upload-plugin.sh) and [.travis.yml](https://github.com/MoreUnit/org.moreunit.intellij.plugin/blob/master/.travis.yml) files ?
