Add gems/unicode.md (#27)

* Update install-d-locally.md

* Update links-documentation.md

* Add basics/loops.md (#30)

* Add basics/foreach.md (dlang-tour#31)

* Add basics/further-reading.md (dlang-tour#36)

* Add basics/templates.md (dlang-tour#38)

* Add basics/delgates.md (dlang-tour#40)

* Add basics/interfaces.md (dlang-tour#35)

* Add basics/ranges.md  (dlang-tour#33)

* Add basics/exceptions.md (dlang-tour#37)

* Add basics/associative-arrays.md (dlang-tour#34)

* Add basics/alias-strings.md (dlang-tour#32)

* Add basics/classes.md (dlang-tour#39)

* Create unicode.md

* Update classes.md (dlang-tour#44)

* Update index.yml

enable all files in basics

* Create unicode.md

* Create unicode.md

* Create unicode.md

* Update unicode.md

* Create unicode.md

* Create unicode.md