Added missing constants in Zend/Crypt/Key/Derivation/SaltedS2k
patch spelling
added old values for @deprecated
Merge branch 'hotfix/#6781-add-missing-hash-algorithm-constants-for-salted-derivation-key'

Close #6781
Composer: Require squizlabs/php_codesniffer
Travis: Run phpcs with PSR-2
Fix: Remove fabpot/php-cs-fixer
Fix: Update README-GIT.md

Remove note about adding Git pre-commit hook.

[skip ci]
Fix: Show phpcs summary report on Travis only

Full report is too long for Travis.
Fix: Use phpcs in GIT pre-commit hook
#6182 - running PHPCS checks in parallel
#6182 - Excluding paths (as of `.php_cs`)
#6182 - Can actually use `"squizlabs/php_codesniffer": "~2.0.0@RC"
Fix: composer.json