Sitemap. Close #110.

Created sitemap on /sitemap
Merge branch 'enhancement-#110' into develop
About. Close #111

Created "/about" page.
Merge branch 'enhancement-#111' into develop
Indicator description AJAX
Fix SIGI indicators
Update views and fix reported bugs.

Most of the reported bugs have been fixed now.  New design of the
home view.
Fix french label
Minor CSS update
Update french translations with latest sugestions
Fix bugs and add datasources description.

Close #112
Update country and reuse views.
Fix country Traffic Lights graph
Update Debates, Events and Blog views
Fix country spider indicator.

The GHI indicator had a typo in its ID ('INDIPFRI0' instead of 'INDIFPRI0')
so the query was returning an empty value.
Fix tendencies graph.

The tendencies graph was not showing the topic names.
Fix label and API token.

Add a missing label and fix the user's API token showing for
all users, wich could lead to security problems.
Fix encoding in search view
Update views.

Fix some missing translations in the country and widget tables.  Fixed
the country selector in the country details view.  Disable Land Library
button in the country details view.
Merge branch 'develop'