Add direction_zero in circle

Запрос на слияние 'master' (#11) из master в master

merge upstream

Запрос на слияние 'master' (#10) из master в master

Запрос на слияние 'master' (#9) из master в master

Запрос на слияние 'master' (#8) из master в master

add tests for findallintersections function

update gitignore

tests for get point on for segment (one doesn't working)

Validation magic

Add tests for Rotation

clean up

Fixed test for closed contours

polyline

working on generation

replace tmin and tmax getters with start and end methods

random generation with arcs

add generateArc function

Add destructor for Contour

random contour generation (only line segments)

Запрос на слияние 'intersections' (#7) из intersections в master

start working on generation

Add include directory in cmake

added test for selfintersections for countour

n = 100

start working on generation

Add include directory in cmake

added test for selfintersections for countour

n = 100

Fixed bug with lack of accuracy in PI