String.isEmpty() only comes with Android API level 9 (or higher). Switching back to old isEmptyString check, making Smack Android compatible again

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13432 b35dd754-fafc-0310-a699-88a17e54d16e
VCardTest: Use VCard.equal() in order to test equality and not the String representation, since the elements within the vcard could be in a different order

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13435 b35dd754-fafc-0310-a699-88a17e54d16e
eclipse: removed old junit from classpath. Smack testcases need junit 3.8.2 or higher in order to run correct

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13433 b35dd754-fafc-0310-a699-88a17e54d16e
PubSub SubcribeForm: Use new StringUtils.formatXEP0082Date to get the correct date string. Note that the previous used SimpleDateFormat "yyyy-MM-dd'T'HH:mm:ss.SSSZ" did not produce XEP-0082 conforming strings, since Z is replace with e.g. '+0100' whereas it should be '+01:00'.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13434 b35dd754-fafc-0310-a699-88a17e54d16e
SMACK-391 Forgot to check in new file.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13438 b35dd754-fafc-0310-a699-88a17e54d16e
Makefile: Added integration-est target and JAVA_TOOL_OPTIONS to set the correct file encoding

Conflicts:
	Makefile
SMACK-395 Socks5BytestreamManager.establishConnection(): Don't bail out with an Exception uf the local XMPP service does not support Service Discovery (e.g. talk.google.com). Instead remember the Exception and give the local proxy (if enabled) a chance.
Also compute the digest only if it's really needed, that is when streamHosts is not empty.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13440 b35dd754-fafc-0310-a699-88a17e54d16e
SMACK-395 Forgot to actually add the discovered proxies

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13441 b35dd754-fafc-0310-a699-88a17e54d16e