dgarijo/Widoco: WIDOCO 1.4.15 (pre-release): Bug fixes and FAQ

(This is a pre-relase. For more information about the next release see https://github.com/dgarijo/Widoco/milestone/2) This pre-release of WIDOCO fixes some bugs and adds a FAQ for common questions posted as issues. In particular, this solves: External links will now open in another window instead of appearing dotted. Fixed issue that made the index not be generated when including all the sections in a single html. Added a FAQ explaining why by default the documentation cannot be seen locally. Added a FAQ regarding how to use markdown on class definitions. Error with a missing path when the CLI was run, which resulted in the /sections folder not being generated. Fixed a typo in acknowledgments Fixed typo in schema.org snippet. Fixed a few URLs from http -> http