Partial CSV virtual table implementation.

Cargo.toml

@@ -19,6 +19,7 @@ blob = []
 functions = []
 trace = []
 vtab = []
+csvtab = ["csv"]
 
 [dependencies]
 time = "~0.1.0"
@@ -34,6 +35,10 @@ regex = "~0.1.41"
 path = "libsqlite3-sys"
 version = "0.4.0"
 
+[dependencies.csv]
+version = "~0.14.3"
+optional = true
+
 [[test]]
 name = "config_log"
 harness = false