Merge pull request #3 from jhenahan/master

Sync with main repo
Translation for "Lambda functions"
Finished translation of "Higher order functions"
Merge pull request #10 from Shekeen/master

Translation for two more parts
Added "Lists at a glance"
Merge pull request #11 from zudov/lists_at_a_glance

Added "Lists at a glance"
Merge pull request #4 from jhenahan/master

Sync with main repo
Translation for "Functional chains"
Merge pull request #12 from Shekeen/master

Translation for "Functional chains" part