added readme with description of programs

Author: Jeff Dean

README.md

@@ -1 +1,87 @@
-See: http://tutuorials.gschool.it/ruby_basics.
+# gSchool Ruby Basics
+
+See http://tutuorials.gschool.it/ruby_basics for more details.
+
+## Exercises
+
+### Greetings
+
+Write a program that asks the user for their name, and then prints out "Hello [name]!"
+
+**Skills**
+
+* Reading input from a user
+* Printing output to the terminal
+
+### Beer on the wall
+
+Write a program that prints out verses of "99 bottles of beer on the wall", according to the following rules:
+
+* The user must type "sing 88", where 88 is any positive number
+* If the user runs the program without typing anything, print "I need to know how many bottles to sing!"
+* If the user runs the program and specifies a verse, print all the lines from the song starting at that verse
+* If the user types anything but "sing <number>", show an error and exit
+
+**Skills**
+
+* Reading input from a user
+* Printing output to the terminal
+* Conditional statements
+* Raising errors
+
+### Deaf Grandma ###
+
+Write a program that:
+
+* Asks the user to write something
+* Prints "HUH?! SPEAK UP SONNY!" if the user didn't type in all uppercase
+* Prints "NO, NOT SINCE 1944!" if the user types something in all caps
+
+Each time the program prints "NO, NOT SINCE 1944!", it should print a different, random year between 1930 and 1950.
+
+**Skills**
+
+* Reading input from a user
+* Printing output to the terminal
+* Generating random numbers
+* Checking strings for their capitalization
+* Conditional statements
+
+### Roman Numerals
+
+Write a program that converts numbers into [http://www.rapidtables.com/convert/number/how-number-to-roman-numerals.htm](Roman numerals).
+
+Decimal value (v) | Roman numeral (n)
+------------------|------------------
+1                 | I
+4                 | IV
+5                 | V
+9                 | IX
+10                | X
+40                | XL
+50                | L
+90                | XC
+100               | C
+400               | CD
+500               | D
+900               | CM
+1000              | M
+
+**Skills**
+
+* Control flow (loops, conditionals / case statements)
+* Converting a String to a Fixnum (integer)
+* Building a string
+
+### Birthday Helper
+
+Write a program that helps users find the birth date and age of a person.  The program should:
+
+* Prompt the user for a name
+* Print that person's name and birth date and age based on the data in `bin/birthday_data.csv`
+
+**Skills**
+
+* Converting a String to a Date
+* Printing a date in a friendly format
+* Reading and parsing data from a file