Remove requirement for explicit globals in translators

[tjaffri]

We currently have declarations like this at the bottom of each translator. We need to discover these globals automatically so these declarations are not required.

// globals for JxCore host
global.initDevice = module.exports.initDevice;
global.getBeatsPerMinute = module.exports.getBeatsPerMinute;
global.getRRInterval = module.exports.getRRInterval;
global.getEnergyExpended = module.exports.getEnergyExpended;
global.getContactStatus = module.exports.getContactStatus;
global.disconnect = module.exports.disconnect;

[jasongin]

This is fixed by my PR #2

[jasongin]

Merged as PR #2