Adjust core apps to use "requiremin" instead of "require"

Also added a few missing authors.

apps/files/appinfo/info.xml

@@ -4,8 +4,8 @@
 	<name>Files</name>
 	<description>File Management</description>
 	<licence>AGPL</licence>
-	<author>Robin Appelman</author>
-	<require>4.93</require>
+	<author>Robin Appelman, Vincent Petry</author>
+	<requiremin>4.93</requiremin>
 	<shipped>true</shipped>
 	<standalone/>
 	<default_enable/>

apps/files_encryption/appinfo/info.xml

@@ -5,7 +5,7 @@
 	<description>The ownCloud files encryption system provides server side-encryption. After the app is enabled you need to re-login to initialize your encryption keys. Please note that server side encryption requires that the ownCloud server admin can be trusted. The main purpose of this app is the encryption of files that are stored on externally mounted storages.</description>
 	<licence>AGPL</licence>
 	<author>Sam Tuke, Bjoern Schiessle, Florin Peter</author>
-	<require>4</require>
+	<requiremin>4</requiremin>
 	<shipped>true</shipped>
 	<documentation>
 		<user>http://doc.owncloud.org/server/6.0/user_manual/files/encryption.html</user>

apps/files_external/appinfo/info.xml

@@ -4,8 +4,8 @@
 	<name>External storage support</name>
 	<description>Mount external storage sources</description>
 	<licence>AGPL</licence>
-	<author>Robin Appelman, Michael Gapczynski</author>
-	<require>4.93</require>
+	<author>Robin Appelman, Michael Gapczynski, Vincent Petry</author>
+	<requiremin>4.93</requiremin>
 	<shipped>true</shipped>
 	<types>
 		<filesystem/>

apps/files_sharing/appinfo/info.xml

@@ -4,8 +4,8 @@
 	<name>Share Files</name>
 	<description>File sharing between users</description>
 	<licence>AGPL</licence>
-	<author>Michael Gapczynski</author>
-	<require>4.93</require>
+	<author>Michael Gapczynski, Bjoern Schiessle</author>
+	<requiremin>4.93</requiremin>
 	<shipped>true</shipped>
 	<default_enable/>
 	<types>

apps/files_trashbin/appinfo/info.xml

@@ -19,7 +19,7 @@
 	<licence>AGPL</licence>
 	<author>Bjoern Schiessle</author>
 	<shipped>true</shipped>
-	<require>4.9</require>
+	<requiremin>4.9</requiremin>
 	<default_enable/>
 	<types>
 		<filesystem/>

apps/files_versions/appinfo/info.xml

@@ -3,8 +3,8 @@
 	<id>files_versions</id>
 	<name>Versions</name>
 	<licence>AGPL</licence>
-	<author>Frank Karlitschek</author>
-	<require>4.93</require>
+	<author>Frank Karlitschek, Bjoern Schiessle</author>
+	<requiremin>4.93</requiremin>
 	<shipped>true</shipped>
 	<description>
 	ownCloud supports simple version control for files.	The versioning app

apps/user_ldap/appinfo/info.xml

@@ -9,7 +9,7 @@
 	</description>
 	<licence>AGPL</licence>
 	<author>Dominik Schmidt and Arthur Schiwon</author>
-	<require>4.93</require>
+	<requiremin>4.93</requiremin>
 	<shipped>true</shipped>
 	<types>
 		<authentication/>

apps/user_webdavauth/appinfo/info.xml

@@ -7,7 +7,7 @@
 	This app is not compatible with the LDAP user and group backend.</description>
 	<licence>AGPL</licence>
 	<author>Frank Karlitschek</author>
-	<require>4.93</require>
+	<requiremin>4.93</requiremin>
 	<shipped>true</shipped>
 	<types>
 		<authentication/>