Fix Cmake Errors
1. The Benchmarking projects for Bolt requires BOOST_ROOT to be defined.
2. The OpenCL Bolt library requires BOOST_ROOT to be defined.
Add global variable BOOST_ROOT to help cmake figure out the boost libraries
and header files.
3. The testing projects for Bolt requires GTEST_ROOT to be defined.
Turn off the Build_tests option.
Fix make install Error
CMake Error at cmake_install.cmake:36 (FILE):
  file INSTALL cannot find
  "/home/zhaoyang/bolt_fork/build/include/bolt/boltVersion.h".
Linux is case sensitive system. So it is to be modified file name
boltVersion.h to BoltVersion.h
Fix make install Error
CMake Error at bolt/cl/cmake_install.cmake:161 (FILE):
  file INSTALL cannot find
  "../external/boost/src/Boost/boost/smart_ptr".
modify the CMakeList.txt so that it can find out the boost header
files.
Fix cmake example Error
-- Could NOT find BOLT (missing:  BOLT_LIBRARY_STATIC)
CMake Warning at FindBolt.cmake:133 (message):
Make generated library libclBolt.runtime.vc90.a findable.
Fix cmake example Error
1. CMake Error at DeviceVector/CMakeLists.txt:29 (add_executable):
    Cannot find source file:
    device_Vector.h
2. CMake Error at Scan/CMakeLists.txt:30 (add_executable):
   Cannot find source file:
   Scan.cpp
Modify the CMakeLists.txt device_Vector.h to device_vector.h
Scan.cpp to scan.cpp.
Fix make example Error
Modify some Windows APIs to Linux APIs.
Fix make example Error
Error:/usr/include/c++/4.6/bits/c++0x_warning.h:32:2: error:
upcoming ISO C++ standard
Fix: add -std=c++0x option.