Add detailed instructions for installing the oracle instant client, including notes about the default directories that the binding.gyp looking for.
Add detailed instructions for installing the oracle instant client,
including notes about the default directories that the binding.gyp
looking for.

devspinn/node-oracle,joeferner/node-oracle,MattKunze/node-oracle,devspinn/node-oracle,highflying/node-oracle,highflying/node-oracle,MattKunze/node-oracle,highflying/node-oracle,joeferner/node-oracle,highflying/node-oracle,joeferner/node-oracle,MattKunze/node-oracle,devspinn/node-oracle,MattKunze/node-oracle,joeferner/node-oracle,devspinn/node-oracle