minor: hyperlink updates in doc
use plasma project code attributes for portability

https://github.com/gstrauss/plasma/
relicense bsock from 3-clause BSD to LGPLv2.1+
explicitly mark public interfaces w/ EXPORT macro

explicitly mark public interfaces with EXPORT macro
compile with gcc -fvisibility=hidden to change default visibility
bpoll - bookkeeping poll interface
bsock daemon single-threaded and event-based

bsock daemon single-threaded and event-based employing bpoll
(instead of spawning thread per connection)
version 0.09 - bpoll and event-based bsock daemon

- relicense bsock from 3-clause BSD to LGPLv2.1+
- use plasma project code attributes for portability
- explicitly mark public interfaces with EXPORT macro
- bpoll - bookkeeping poll interface
- make bsock daemon single-threaded and event-based employing bpoll
  (instead of spawning thread per connection)