Initial Commit.

add function implemented.
3 tests added.
Create README.md
doc added to calc.js
Subtraction function added.

sub function added.
4 tests added.
Merge branch 'feature-sub'

Subtraction feature added.
doc file for v0.2.0 added.
multiplication function added.

mult function added to calc.js
5 testes added.
calc.js header doc updated.

list of available features added to header doc in calc.js
doc updated.

doc for v0.3.0 added.
Merge branch 'feature-mult'

multiplication feature added.
calc.js header doc updated.

mult added to feature list in calc.js header doc.
lib1.js added.
lib2.js added.
tests for div added.
Revert "lib2.js added."

This reverts commit 601ed415e14ec0bfb6776311f533f98d3d84fa17.
cenas.html added
Merged Readme.md