Official support for HHVM

tests are not allowed to fail anymore.
added bootstapping tutorial
added bootstapping tutorial
Create start-hello.md
Fixed irregular numeric declination for slovak locales

close #5214
finished routing tutoail [skip ci]
Update start-hello.md
Update start-hello.md
Merge pull request #5222 from Benn/patch-1

[skip ci] Create start-hello.md
jquery .val() not .value

In line 180. 
It should be .val() instead of .value.

This is my first edit.
Update tutorial-template-engines.md

just fixed typo
Merge pull request #5229 from unti1x/patch-1

[skip ci] Update tutorial-template-engines.md
Merge pull request #5228 from kshitizsingh/patch-1

[skip ci] jquery .val() not .value
Update README.md

Updated instructions for the current reality.
Merge pull request #5235 from githubjeka/patch-1

[skip ci] Update README.md  instruction for install core framework.
Russian i18n tutorial
Latvian translation RC-update
Latvian translation fixes
Issue 5160: Update advanced app to use bootstrap ActiveForm
Issue 5160: Update base app to use bootstrap ActiveForm