Ravinder,
The reference designs available in that section are for the TI MSP430 platform.
If you follow the steps in the N5 Starter Kit user manual, you will download and install both the Nordic nRF51 and N5 Starter kit SDKs. These SDKs contain development examples for the N5 module. The location I provided earlier will be in the installed folder of the Nordic nRF51 SDK, it is not for a website.