refactoring php pageView tracker request call to include user agent n…

…ad accept headers. Refactoring setcooie function to work properly with php 7.3+, fixes #8.

bumping guzzle version,adding user agent header to http client and be…

…tter debug control.

refactoring return values of Sites client methods and adding better e…

…rror handling for guzzle requests.

formating.

adding stateless track method to handle dealyed ecommerce transactions.

downgrading polyfill-mbstring to avoid use of php8 syntax whcih break…

…s WordPress plugin use.

donwgrading guzzel and synfony dependancy because they break the Word…

…PRess plugin pro untill it supports php 8 syntax in plugins.

Merge pull request #5 from daemon-byte/master

allow install via composer

Merge pull request #5 from daemon-byte/master

allow install via composer