Whats the purpose of libegg

["Bin Chen" <binary chen gmail com>]

Hello,

I searched the internet for libegg and found some tips but still can't
got whats libegg working for? Is it another useful widget lib?
After I check out the libegg and catch the README:

  - All features are intended to end up in a stable platform library
     when they're ready.

Whats the meaning?

Thanks.
Bin