Merge pull request #976 from nghuuphuoc/docs-dev

Docs dev
Add notification
Update config
Add Albanian language package
Update "Hiding success class" example
#906: Update identical validator document
Add HTML 5 example for regexp validator
Add declarative usage for date validator
Add data-bv-validatorname="true" notification
#905: Add notification about adjusting icon position
#979: Add Rails usage for stringLength validator
Add HTML 5 example for stringLength validator
Add declarative usage for different validator
Add declarative usage for notEmpty, callback, choice validators
Update validators that support HTML 5 inputs
#912: Add "Using language package" example
Update path to additional language package
#319: Update Rails example
Fix the link to Stargazers
Add declarative usages