Fix error related with connection_close test. (exception made gen_server crash).
Remove message_queue test. Uncomment tests that already pass.

Also remove some lines of old commented code.
Fix error related with suspende_manager test case (timeout when connecting client).
Fix errors found by dialyzer. Now dialyzer test pass without problems.

Still migth be necessary to improve the specs.
Fix partial upload/download
Merge remote-tracking branch 'ramon/new_version' into partial_updown

Conflicts:
	test/lhttpc_tests.erl