Add protocol/scheme to url from getCLIMailingUrl().

Should fix bug #1983.
Merge pull request #214 from Freso/1983-incoming-mail-fix-32

Fix bug #1983: Add protocol/scheme to url from getCLIMailingUrl().
correct title method for returning issue title via json (real fixes issue #1960)
Merge pull request #218 from nevergone/branch-32

correct title method for returning issue title via json (real fixes issue #1960)
fix issue with modifying sprint with non-utf8 characters (fixes issue #1477)
fix caching sometimes not working properly on multi-scoped installations
fix trying to load unavailable objects on multi-scoped installations
fix endless redirect loops
scope admin fix
fix cache key failure