Added dedicated changelog file
Revert "Added dedicated changelog file"

This reverts commit 3c66e8cd29d41742e03c8be60f1761fac26c1a86.
Instantiations, methods, code clean-up.

-Instantiated the EditText field "Input"
-Added void method buttonClickHandler, which expects a parameter V of
type 'View'.
-Added a switch statement to the "buttonClickHandler" method, which will
decide what will happen when a specific button is pressed.
-Added a method stub 'solve', which will take the characters in 'Input'
and create an equation which the machine will solve.
-Some code clean up
Merge branch 'master' of github.com:jm-1013/Personal-Calculator

Conflicts:
	PersonalCalculator/src/com/pk/personalcalculator/ActivityMain.java

-Instantiated EditText field "Input"
-Added method 'buttonClickHandler'
-Added switch statement to buttonClickHandler method
-Added method stub 'solve
Merge branch 'master' of github.com:jm-1013/Personal-Calculator