Cmake update and install

Xmipp requires a cmake version 3.16 or above.

Ubuntu

If you have not installed cmake please

sudo apt-get install -y cmake

If you have an older version, to install the newest:

...

Centos

• wget https://github.com/Kitware/CMake/releases/download/v3.17.3/cmake-3.17.3.tar.gz
• tar -zxvf cmake-3.17.3.tar.gz
• cd cmake-3.17.3
• ./bootstrap
• make
• sudo make install
• Verify the installed version by typing sudo --version