What does this pull request do?

Merge Vitro-languages into the Vitro repository

What's new?

There is i18n module in the Vitro project. Vitro-languages project is not needed anymore.

configure tomcat directory and home directory in installer/example-settings.xml
clean home directory and maven repository (org.vivoweb)
mvn clean install -o -s installer/example-settings.xml
run tomcat
check application in the web browser (try to log in and browse a little bit)
check structure of /webapps/vivo directory (especially i18n directory, there should be property files and 3 readme files)
check structure of directory, especially rdf/i18n/fr_CA/display/firsttime/ (there should be 1 file containing UILabels term, this is just an example, not containing all UI labels, just one)
please check display/firsttime directories (point 7) for other languages

Does this change require documentation to be updated? documentation about adding new language should be updated
Does this change add any new dependencies? NO, but the files are reorganized, there are changes in pom files, but no new dependencies
Could this change impact execution of existing code? Hopefully not, but it would be nice to have a test
Large pull requests should be avoided. If this PR is large (more than 1,000 lines of codes), please provide short explanation why your contribution can't be decoupled in smaller PRs. This is a huge PR, because we need to keep files history, which is moving from the another repository. Please, check only changed files in the last commit.

Tag (@ mention) interested parties or, if unsure, @VIVO-project/vivo-committers