#18 solved
#67 solved
Project updated for #18 and #67
next unsuccessful try...
Problem 15 ready -- based on solution found on Web :(
Warning about wrong identation fixed.
EP17 plus tests (FsUnit/NUnit)
Passing all numbers from 1 to 99
Support for all numbers in range 1-1000 added
Refactoring to make code more clear & clean
Problem 17 solved :)