REPO: clean the repository from redundant files

Create README.md

add file RBC_description_CZ.md

add file RBC_image_description.png

motorEncoder secondary int32_t counter to prevent short term overflow.

motoreEncoder frequency is sensitive to orientation of rotation.

Calculating engine frequency non-sensitive to orientation.

Repaired PCNT initialization to used just pins and PCNTs needed for specific motorEncoder object.

Internal motorEncoder class struct for storing interrupt time data.

motorEncoder data accessed completely through MotorEncoder class.