Delete .rvmrc
[task 2] Abolish gender norms

The homework shouldn't contain tasks that are male-oriented.
Historically and socially, women aren't warriors, so they aren't hunting
saber-tooth tigers, and they also can't grow an "epic" mustache.
Rewrite sample spec for challenge 6 using expect syntax
Merge pull request #7 from bostko/patch-1

Delete .rvmrc
Add `to_s` methods

When there are no to_s methods tests fail with:

expected: "x^2 + 2"
            got: #<Polynomial:0x007fe365284f10 @coefficients="x^2 + 2">

In the README.md there is also the to_s method:

    Polynomial.new([-3, -4, 1, 0, 6]).to_s #=> '- 3x^4 - 4x^3 + x^2 + 6'
    Polynomial.new([1, 0, 2]).to_s         #=> 'x^2 + 2'
Merge pull request #12 from mislav/abolish-gender-norms

[task 2] Abolish gender norms
Merge pull request #14 from AlexVPopov/sample-spec

Rewrite sample spec for challenge 6 using expect syntax.
Add example in the todo list and update the sample spec.
Add the full spec and an example solution for hw02
Add the seventh challenge - Bitmap
FIx the description of the seventh challenge
Add better solution for the second homework