Test 7zip file, based on the other test archive files, for TIKA-1243

git-svn-id: https://svn.apache.org/repos/asf/tika/trunk@1570850 13f79535-47bb-0310-9956-ffa450edef68
TIKA-1243 - Upgrade to Commons Compress 1.7, and add a disabled unit test for 7z support. 7z support is not enabled yet, pending a commons compress fix

git-svn-id: https://svn.apache.org/repos/asf/tika/trunk@1570857 13f79535-47bb-0310-9956-ffa450edef68
Remove debug line accidently committed

git-svn-id: https://svn.apache.org/repos/asf/tika/trunk@1570858 13f79535-47bb-0310-9956-ffa450edef68
Create a spanned zip test file for TIKA-1241

git-svn-id: https://svn.apache.org/repos/asf/tika/trunk@1570859 13f79535-47bb-0310-9956-ffa450edef68
TIKA-1241 Mime Magic for empty and spanned zip files, plus spanned zip file detection unit test

git-svn-id: https://svn.apache.org/repos/asf/tika/trunk@1570860 13f79535-47bb-0310-9956-ffa450edef68
Patch from TIKA-1225 from Marco Quaranta - MDI mime magic

git-svn-id: https://svn.apache.org/repos/asf/tika/trunk@1570879 13f79535-47bb-0310-9956-ffa450edef68