Add a `ev-reset` atribute to the `ev-pane` directive

When set to true, the pane is re-linked each time it is displayed (as if we used `ng-if`).
When set to false, it is only hidden / showed (like `ng-show`)

See https://github.com/Evaneos/ev-fdm/issues/45
[Generating dist files]
Merge pull request #46 from Evaneos/reset-tab

Add a `tab-reset` attribute to the `ev-pane` directive
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