Imports of custom_func command

PathSynopsis
database/sqlPackage sql provides a generic interface around SQL (or SQL-like) databases.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/mattn/go-sqlite3Package sqlite3 provides interface to SQLite3 databases.
logPackage log implements a simple logging package.
mathPackage math provides basic constants and mathematical functions.
math/randPackage rand implements pseudo-random number generators suitable for tasks such as simulation, but it should not be used for security-sensitive work.