Update for boost-1.5
Update include/Config.h.cmake to have correct boost filesystem version.
Add CMake artifacts to gitignore
Merge pull request #35 from upthere/boost-1.5x

Update for boost-1.5
The right hand side needs to be cast to int64_t before being shifted.

- Thanks to kojik1010.
Fixed unit tests.
Disable pch in waf.
Release version 3.0.4.
Fix segfault when recording directory listing (Marcin Junczys-Dowmunt).
Turn off custom allocator by default.

closes #40
Strip symbols from shared libraries.

closes #39
Remove outdated note about Boost incompatibility from the README.

Commit e3f8992 ported the code to use Boost.Filesystem V3 API,
so the warning about not being able to use Boost 1.50+ is no longer true.
Merge pull request #41 from vslavik/patch-1

Remove outdated note about Boost incompatibility from the README.