Merge pull request #133 from mnegacz/dev

DEP-2
Merge pull request #134 from qmar/dev

Jira: issue changelog download, multithreading, DEP-6
minor correction for DEP-2, DEP-3
Merge pull request #135 from majchmar/master

small changes for DEP-2, DEP-3
Merge remote-tracking branch 'upstream/dev' into dev

Conflicts:
	ic-depress-its-bugzilla/src/org/impressivecode/depress/its/bugzillaonline/BugzillaOnlineAdapterNodeDialog.java
	ic-depress-its-bugzilla/src/org/impressivecode/depress/its/bugzillaonline/BugzillaOnlineAdapterNodeModel.java
	ic-depress-its-bugzilla/src/org/impressivecode/depress/its/bugzillaonline/BugzillaOnlineClientAdapter.java
	ic-depress-test/test/org/impressivecode/depress/its/bugzillaonline/BugzillaOnlineClientAdapterIntegrationTest.java