Add ignores for IDE and composer
Split Calc to separate files by PSR standards - one class per file, use namespaces
Add initial composer file with phpunit in development requirments
Ignore composer
Add phpunit configuration file, add test loader/bootsrap
Add Coding Style fixer to required development
Fix CS for tests bootstrap
First few little test for Rolling ant math
Return data of calc as is, without HTML in boolean types
Add php code sniffer to development requirments
Fix tests according PSR standards
Fix main library code by PSR standards
Add php mess detector to composer file
Fix exception namespace
Add phpqa tools, move development requirements to proper place in json file
Remove unused variables and parameters
Tests for Calc Operation
Add phpDoc blocks to define parameters types, throw exceptions and define return types
Add false on return in case of errors, fix some unexpected behaviour
Keep postfix test