Update of IPv6 exercises
Final version of IPv6 exercises
Fix typos in IPv6 exercises
Merge branch 'master' into tempo
Fixed typos
Conflicts:
	book-2nd/mcq-ex/mcq-ipv6.rst
Merge branch 'master' of github.com:obonaventure/cnp3 into tempo
fix typo
fix typos
Merge branch 'master' of github.com:obonaventure/cnp3 into tempo
Exercices on routing policies and icmpv6
Merge pull request #121 from blegat/master

Various typo fixes
ex-routing-policies: fixed typo and verbatim

IPv6 addresses were not in verbatim mode
And fixed one typo: `://` instead of `::/`
First draft of BGP exercises, includes new MCQ
Merge pull request #124 from matttbe/patch-3

ex-routing-policies: fixed typo and verbatim
Closes #122 and #123
routing-policies: removed BGP exercice

It's now available in BGP exercices
closes #128
Merge pull request #126 from matttbe/patch-3

routing-policies: removed BGP exercice
Merge pull request #130 from blegat/master

Fix IPv6 address
Update picture for the switches in reference model
Merge pull request #131 from oliviertilmans/patch-3

Update picture for the switches in reference model