Install boost on centOs6.5

```
wget http://sourceforge.net/projects/boost/files/boost/1.56.0/boost_1_56_0.tar.gz
tar -xvzf boost_1_56_0.tar.gz && cd boost_1_56_0
./bootstrap.sh --with-libraries=system,filesystem,log,thread --with-toolset=gcc 
./b2 toolset=gcc cxxflags="-std=c++11"  
./b2 install --prefix=/usr
```
