tealeg/xlsx — pull request #70 by shibukawa (2014-12-26 09:57:29+00:00)
Title: add cell types like int, float, boolean, formula

Original code treats all values as string. My change adds following features:

* Cell has method to get cell type (Type)
* Cell has methods to set value with type (SetString, SetInt, SetFloat, SetBool, SetFormula)
* Cell has methods to get value with type conversion (String, Int, Float, Bool, Formula)
* Read/Write xlsx with types