selenium: refactor main method into sub-methods
selenium: adding test for temperature conversion page
selenium: adding support for ffox profiles

e.g. usage: for a profile that has a proxy configuration
selenium: temperature page - adding initial stub

e.g. usage: for a profile that has a proxy configuration
selenium: temperature - adding regex to read values
selenium: temperature - refactor for flexibility
selenium: temperature - added test values

also updated regex for negative values
selenium: refactor to evaluate returned temperature values

returning String because some requirements are based on the string
representation of the number.
e.g. precision
selenium: validating precision

Added method to check requirements for precision of calculated
temperatures
selenium: validating precision - part2

Added method to check requirements for precision of calculated
temperatures