Easier use for other Apps working with Global Sharing API 

Now if you would like to use the global share api so it's much easier to work with!
No additional share js code for an app is needed!
For example e.g. calendar
init share calendar we need:

I. Checking global rights of the share Api
```
$tmpl->assign("mailNotificationEnabled", \OC_Appconfig::getValue('core', 'shareapi_allow_mail_notification', 'yes'));
$tmpl->assign("allowShareWithLink", \OC_Appconfig::getValue('core', 'shareapi_allow_links', 'yes'));
```
II. we need the global input fields
```
<input type="hidden" name="mailNotificationEnabled" id="mailNotificationEnabled" value="<?php p($_['mailNotificationEnabled']) ?>" />
<input type="hidden" name="allowShareWithLink" id="allowShareWithLink" value="<?php p($_['allowShareWithLink']) ?>" />
```
III. we need the share link e.g. sharing Calendar
```
<?php if ($_['calendar']['permissions'] & OCP\PERMISSION_SHARE) { ?>
		<a href="#" class="share permanent" 
		data-title="<?php p($_['calendar']['displayname']) ?>"
		data-item-type="calendar" 
		data-item="<?php p($_['calendar']['id']); ?>"
		data-link="true"
		data-possible-permissions="<?php p($_['calendar']['permissions']) ?>"
		title="<?php p($l->t('Share Calendar')) ?>"
		style="background:url(<?php print_unescaped(OCP\Util::imagePath('core', 'actions/share.svg')) ?>) no-repeat center;"
		   ></a>
	<?php } ?>
```
```
data-title="<?php p($_['calendar']['displayname']) ?>"
```
is new and needed if we would like to send an email to an external!

IV. need init the Icons
```
OC.Share.loadIcons('calendar');
```
That's all!
Now you can manage your shares with the global share api, automatically you can define Share via Link, Send E-Mail internal or send E-Mail for external User!

No! that above is an example! If you would like to use the global share api, you have to do only one thing! You have to add an link with the class "share" and than the information inside the link
so the attribute data-title now can filled with each description you want, e.g. the fullname or addressbooks name, or if you share a gallery the album name, this data-title is also used for subject, text emails sending. the old one was only files specific!