tag the 1.9.1 release
Update Versions.txt
Update build files with some improvements from the TortoiseSVN build files.
Bump version to 1.9.1
Update to serf 1.3.0 and svn 1.8.1
Fix the LNK4049 warning.
Fix issue #390.
*.build files: remove unneeded parentheses.
update Scintilla to v3.3.4
Exclude OpenSSL.build from default.build when cleaning since OpenSSL is cleaned separately.
This fixes the LNK4099 warnings and thus issue #389.
