Merge pull request #23 from designium/patch-1

Updated README.md to include the list of functions

README.md

@@ -87,6 +87,20 @@ Run `bundle install`.
 ## Running tests
 
     bundle exec rspec spec/
+    
+## Available Functions
+
+** Simple financial functions **
+- fv(rate, nper, pmt, pv[, when])	Compute the future value.
+- pv(rate, nper, pmt[, fv, when])	Compute the present value.
+- npv(rate, values)	Returns the NPV (Net Present Value) of a cash flow series.
+- pmt(rate, nper, pv[, fv, when])	Compute the payment against loan principal plus interest.
+- ppmt(rate, per, nper, pv[, fv, when])	Compute the payment against loan principal.
+- ipmt(rate, per, nper, pv[, fv, when])	Compute the interest portion of a payment.
+- irr(values)	Return the Internal Rate of Return (IRR).
+- mirr(values, finance_rate, reinvest_rate)	Modified internal rate of return.
+- nper(rate, pmt, pv[, fv, when])	Compute the number of periodic payments.
+- nrate(nper, pmt, pv, fv[, when, guess, tol, …])	Compute the rate of interest per period.
 
 ## Contributing
 
@@ -98,4 +112,4 @@ Run `bundle install`.
 
 ## License
 
-MIT License. See LICENSE for details.
+MIT License. See LICENSE for details.