Add support for examining structs for query helpers.

pan can now determine the name of the SQL column associated with a
struct's property. It also created a "sqlTableNamer" interface that
allows types to specify the name of the database table they should be
stored in. In short, less hard-coded column names and table names in
SQL, more inspection of tags and a special interface.
Merge branch 'master' of github.com:DramaFever/pan into paddy_reflect
Add godoc.

All the reflect methods now have godoc comments on them.

The README has been updated accordingly.
Escape tick in godoc.

This should fix our rendering error in the readme.
Fix final rendering issues in godoc.

Tick marks continue to ruin my life.
Merge pull request #3 from DramaFever/paddy_reflect

Add support for examining structs for query helpers.