Kill mutants in Algebra#divide
Kill mutants in Algebra#multiply

* Choose covering example domain
* Use covering examples for unit algebra
Kill mutants in Algebra#substract

* It cannot be proven early convert has a semantical difference.
Adjust flay score
Whitespace and comment style
Fix space after comma
Use single quotes for non interpolated string literals
Prepare changelog for v0.1.0
Use 1.9 style hashes
Use spaces around operators
Fix whitespace
Prefer sprintf over % operator
Prefer eval_gemfile over eval File.read
Add spec at correct location