Changed the type of table names to include binaries and strings.

Table names get converted into iolists anyway, and in some applications,
it is undesireable to have to create atoms for dynamic table names.

include/sqlite3.hrl

@@ -20,6 +20,7 @@
 -endif.
 
 -define(NULL_ATOM, null).
+-type table() :: atom() | binary() | string().
 -type sql_value() :: number() | ?NULL_ATOM | iodata() | {blob, binary()}.
 -type sql_type() :: integer | text | double | real | blob | string().