Extensions were added twice
Updated changelog
French start-installation.md (wip) [skip ci]
translated
translated
Adds twig lexerOptions to ViewRendererTest to demonstrate error
Fixes Twig lexerOptions throwing exception (#3877) and adds test for lexerOptions
intro upgrade from v1 guide translated
fixed installation header
Create caching-page.md

Translate "Page Caching"
English guide small fix [skip ci]
Merge pull request #3888 from lucianobaraglia/translation-es

English guide small fix [skip ci]
structure-views.md is ready.
Small fix in english guide [skip ci]
Spanish guide structure-applications.md [skip ci]
Merge pull request #3889 from lucianobaraglia/translation-es

Translation es
call asArray() instead of assign directly

fixes #3891
Fix typo [skip ci]
use different file names in tests to ensure they can run on HHVM
French start-installation.md [skip ci]