add search functionality

[slrslr]

Hello,

can You please add search field into ZeroBlog. I think it can greatly increase usefulness of the whole product

Similar requests:
http://127.0.0.1:43110/Talk.ZeroNetwork.bit/?Topic:1514127848_1L4dZcDF2maSKHDy788yhxpYnBWnXadUtS

One can currently search in connected sites via ZeroHello (there is a search field), but more handy for noobs might be direct search on a site one is at.

[tlaurion]

@HelloZeroNet this would seriously be useful.
Tagging top 5 contributors: @shortcutme @tangdou1 @cxgreat2014 @ysc3839 @AceLewis

Blockers?