Initial Checkin

[SVN r8661]
Added Boost.Signals library

[SVN r13964]
add or update See www.boost.org comments

[SVN r16708]
"envelope" for non-type template parameters (useful to workaround compiler bugs)

[SVN r18270]
removed superfluous spaces

[SVN r18271]
Boost.Signals now uses the official Boost license

[SVN r20236]
new license reference

[SVN r22834]
Doug Gregor -> Douglas Gregor

[SVN r24016]
Converted to Boost Software License, Version 1.0

[SVN r24055]