chapter-01: Fix chapters references

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
chapter-02: Fix chapters refs

A typical chapter reference construction should
look like <word>~\ref{ch:N}.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
chapter-03: Fix chapters refs

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
chapter-04: Fix chapters refs

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>