s130_nrf51_2.0.0

This release consists of the following:
- This readme file
- The s130_nrf51_2.0.0 API (SoftDevice header files)
- The s130_nrf51_2.0.0 license agreement
- The s130_nrf51_2.0.0 release notes
- The s130_nrf51_2.0.0 SoftDevice (binary hex file)
- The s13x_nrf5x_2.0.0 migration document
