Put API key/secret in its own seperate file, gitignored of course

Signed-off-by: Dsyko <dsykora@gmail.com>
Test file for GoxAPI

Signed-off-by: Dsyko <dsykora@gmail.com>
Name changes, added trade_order function to MtGox class

Signed-off-by: Dsyko <dsykora@gmail.com>