Fix build issues for Visual Studio 2008
build: Fix issue with windows library suffixes

Currently when using PCLConfig.cmake the libraries are searched with a
suffix of either _debug or _release.  When building with either
RelWithDebInfo or MinSizeRel these are not preoprly setup in the
CMakeLists.txt

As result when building with RelWithDebInfo you get libraries named
pcl_io.dll

but the PCLConfig.cmake looks for pcl_io_release.dll

This patch adds the release suffix to both RelWithDebInfo and
MinSizeRel to solve the problem.
build: Improve definition of uint8_t fix
build: No need for stdint.h header

Using boost definitions for uint8_t via pcl_macros.h

This allows compilation on visual studio 2008 which does not
provide stdint.h
Merge pull request #714 from gcasey/buildfixes

Windows build fixes