Updated translation: Removed not needed strings
Updated feature: Updated Mbstring check
Updated feature: Updated systemcheck view
Updated translation: Amended Russian
Update Issue #373: Removed system/http/exception
Fixed issue: Fixed a problem of inheritance (OOP)
Updated feature: Improved getting environment variable
Merge pull request #561 from sergeyklay/installer

Improved Installer
Merge pull request #563 from sergeyklay/feature-error-handle

Removed system/http/exception
Merge pull request #564 from sergeyklay/feature-getenv

Improved getting GLEEZ_ENV
Fixed issue: Rollback $_SERVER instead getenv()
Merge pull request #565 from sergeyklay/feature-getenv

Fixed issue: Rollback $_SERVER instead getenv()