Add apache URL encoder

* see #504 :

* update guava to have access to UrlEscapers
* add function in morph to encode item
* add morph function description
* add schemata used to include morph function
* update test file
Rename "apache-urlencode" to "urlescaper"
Merge branch 'issue-504-uris-encoding' into merge_17-504

Conflicts:
	lodmill-rd/src/main/resources/morph-functions.properties
	lodmill-rd/src/main/resources/morph-hbz01-to-lobid.xml
	lodmill-rd/src/main/resources/schemata/metamorph.xsd
	lodmill-rd/src/test/resources/hbz01.nt