Add random songs option

[rdrms]

I really love mpdroid, but one thing I miss from ncmpcpp on my desktop is the ability to add random (or psuedorandom) songs to the playlist from the library.

ncmpcpp does a great job of this (hit ` and you can add a user defined number of Songs, Albums, or Artists) and I'd love to be able to have the same functionality with mpdroid.

[42kohd]

I will just pitch in that this is a killer feature. Random by genre would be awesome too (but just random 100 songs is all I want). Something another MPD client did was "shake to add XXX songs" which I actually used all the time. Great app though!

[ochurlaud]

For reference in ncmpcpp...

• https://github.com/arybczak/ncmpcpp/commit/df15fe2bf401ad2eaf9ab903ad091480394be054
• https://github.com/arybczak/ncmpcpp/commit/dd266b0103b5cd05e509c209503d46bbcdcc97b0