Not all CurieBLE library functions are documented

Not all of the functions used in the CurieBLE library examples are documented in the library reference page on arduino.cc (https://www.arduino.cc/en/Reference/CurieBLE). These should be easy enough to do since they are already documented to some extent in the source code. What is likely an incomplete list follows:

----
`BLE.scan()`:
https://github.com/01org/corelibs-arduino101/blob/2.0.2/libraries/CurieBLE/src/BLEDevice.h#L367-L381
```c++
/**
* @brief Start scanning for peripherals with the option of accepting all detectable
* Peripherals or just the newly detected.
*
* @param[in] withDuplicates true - return all detectable Peripherals.
* false- return a detected Peripheral only once.
*
* @return none
*
* @note When, withDuplicates = true, accept all detectable Peripherals.
* No Peripheral filtering process applied to the scan result.
* By default, withDuplicates = false, a detected Peripheral is
* reported once.
*/
void scan(bool withDuplicates = false);
```
----
`localName()`:
https://github.com/01org/corelibs-arduino101/blob/2.0.2/libraries/CurieBLE/src/BLEDevice.h#L477
```c++
String localName() const; // returns the advertised local name as a String
```
----
`BLE.stopScan()`:
https://github.com/01org/corelibs-arduino101/blob/2.0.2/libraries/CurieBLE/src/BLEDevice.h#L440-L449
```c++
/**
* @brief Stop scanning for peripherals
*
* @param none
*
* @return none
*
* @note none
*/
void stopScan();
```
----
`BLE.scanForUuid()`:
https://github.com/01org/corelibs-arduino101/blob/2.0.2/libraries/CurieBLE/src/BLEDevice.h#L402-L419
```c++
/**
* @brief Start scanning for peripherals and filter by service in ADV and
* the option of accepting all detectable Peripherals or just the
* newly detected.
*
* @param[in] service The service
*
* @param[in] withDuplicates true - return all detectable Peripherals.
* false- return a detected Peripheral only once.
*
* @return none
*
* @note When, withDuplicates = true, accept all detectable Peripherals.
* No Peripheral filtering process applied to the scan result.
* By default, withDuplicates = false, a detected Peripheral is
* reported once.
*
*/
void scanForUuid(String uuid, bool withDuplicates = false);
```

Originally reported at http://forum.arduino.cc/index.php?topic=500757