#1 #4 possibility for mtx-log limitation, auto-purge of entries older than X hours, other way of paging
removed unnecessary whitespace-line-generation in paging-macro
#5 added a cut-off function for email-addresses longer than 25 characters

for the header and the mailaddress-overview-page too
changed validation for mailaddresses
#1 changed value-interpretation for mailtransaction.maxage

0 will now be interpreted as "no transactionlogging at all" and -1 means "no transactions will be purged"
Merge branch 'refs/heads/fix-1-4-transaction-paging' into develop

Conflicts:
	xcmailr-webapp/src/main/java/views/layout/header.ftl.html