ENH: Added -fPIC option to the linux_gcc_build_x64_debug.sh, so the Boost libraries will be always compiled as a position independent code, even if they're static. It makes possible to link them to the shared library lib4neuro.

FIX + NEW: Trying to fix CI + added new compilation script for CI Ubuntu with dependencies stored in system paths.

Rewitten compilation to simplify CMake scripts and to be able to compile examples just linked with 4neuro without being forced to link/include other dependencies.