added cucumber feature for checking blood tests range
added test checking for hb range method
added tests checking range for Hb and MCV methods
added tests and range checking method for wbc
added tests and range checking method for platelets
added tests and range checking method for neutrophils
added tests and range checking method for lymphocytes
added tests and range checking method for alt
added tests and range checking method for Alk Phos
added tests and range checking method for creatinine
added tests and range checking method for esr
added tests and range checking method for crp
added range validation
Refactored blood tests table, moving code to helpers
Made CRP check more stringent
Added colour to validated cells
Added ordering to blood test display
Validates uniqueness of date of blood test
Empty value bugfix
Allowed floating point number values for blood tests