Mono integration

Added payment integration with mono.

E-mail integration

Added verification email and recovery paasword over email.

Users communication

Added feedback form to hear users.

Gallery improvement

Added preview video with and unknown file extensions.

Developers integration

Added section with documentation for developers.

Improved photo uploader

Added five preview file with quality adjustments for balancing between size and quality.

Video uploader module

Implemented uploading video with preview 10 sec 360p.

Gallery module

Implemented fetching uploaded files with preview in gallery.

File uploader module

Implemented uploading photo files with preview.