MARMOTTA-189: included simple timeline using timeknots.js
MARMOTTA-189: set default encoding in templating to enable url-encoding
see http://freemarker.org/docs/ref_builtins_string.html#ref_builtin_url
MARMOTTA-189: added timeline for memento using timeknots
see https://github.com/alangrafu/timeknots

Waiting for the timeknots-webjar to be released
MARMOTTA-189: timeknots webjar is now available!
MARMOTTA-189: added redistribution LICENSE entry for timeknots (MARMOTTA-321)
Merge branch 'MARMOTTA-189' into develop