HTTPBuilder-0.5.1

minor incremental releases for 0.5.x branch

• Due:30/Sep/10

• GMOD-165 2011-01-03T23-04 29/Dec/11 HTTPBuilder-0.5.1 has invalid POM SHA1 in codehaus Maven repo
• GMOD-155 2010-10-05T18-15 02/Dec/10 HTTPBuilder: sha1 error when downloading project pom from repos
• GMOD-153 2010-09-21T12-15 01/Oct/10 Update Groovy and HttpClient dependencies