Rename protocols

For internal consistency and also to avoid confusion with 
`clojure.java.jdbc` protocols.

src/next/jdbc/prepare.clj

@@ -14,7 +14,7 @@
 
 (set! *warn-on-reflection* true)
 
-(defprotocol ISQLParameter :extend-via-metadata true
+(defprotocol SettableParameter :extend-via-metadata true
   "Protocol for setting SQL parameters in statement objects, which
   can convert from Clojure values. The default implementation just
   calls .setObject on the parameter value. It can be extended to use other
@@ -23,7 +23,7 @@
     "Convert a Clojure value into a SQL value and store it as the ix'th
     parameter in the given SQL statement object."))
 
-(extend-protocol ISQLParameter
+(extend-protocol SettableParameter
   Object
   (set-parameter [v ^PreparedStatement s ^long i]
     (.setObject s i v))

src/next/jdbc/result_set.clj

@@ -36,7 +36,7 @@
   (column-names [this] "Return the column names from a result set.")
   (row-values [this] "Return the values from the current row of a result set."))
 
-(defprotocol IReadColumn
+(defprotocol ReadableColumn
   "Protocol for reading objects from the java.sql.ResultSet. Default
   implementations (for Object and nil) return the argument, and the
   Boolean implementation ensures a canonicalized true/false value,
@@ -46,7 +46,7 @@
   (read-column-by-index [val rsmeta idx]
     "Function for transforming values after reading them via a column index."))
 
-(extend-protocol IReadColumn
+(extend-protocol ReadableColumn
   Object
   (read-column-by-label [x _] x)
   (read-column-by-index [x _2 _3] x)