merge mmcm: Put "unsigned" at the end of a type description to match actual SQL syntax.
merge mmcm: Put "unsigned" at the end of a type description to match actual SQL syntax.

https://code.launchpad.net/~mmcm/akiban-server/ais-describe-unsigned/+merge/128772
shunwang/sql-layer-1,ngaut/sql-layer,qiuyesuifeng/sql-layer,wfxiang08/sql-layer-1,jaytaylor/sql-layer,relateiq/sql-layer,jaytaylor/sql-layer,relateiq/sql-layer,ngaut/sql-layer,qiuyesuifeng/sql-layer,shunwang/sql-layer-1,qiuyesuifeng/sql-layer,qiuyesuifeng/sql-layer,wfxiang08/sql-layer-1,jaytaylor/sql-layer,wfxiang08/sql-layer-1,shunwang/sql-layer-1,wfxiang08/sql-layer-1,relateiq/sql-layer,ngaut/sql-layer,jaytaylor/sql-layer,ngaut/sql-layer,relateiq/sql-layer,shunwang/sql-layer-1