add files for tasks #2
add 2.4 task
add 2.5 task
add BINARY_DIR to files
fix 2.4 task
fix 2.5 task
fix 2.5 task and add binary_reader
fix binary_reader
typo
fix 2.4 task for binary_reader
add 2.6 task
fix binary_reader
fix 2.6 task
fix bugs
fix task 2.5
Merge pull request #120 from VersiBy/master

adding HomeWork #2 from VersiBy