Remove bitdeli badge
remove my solutions
update contributing instructions
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Classes/product_inventory.py
	Classic Algorithms/collatz.py
	Numbers/alarm.py
	Numbers/binary_decimal.py
	Numbers/calc.py
	Numbers/change.py
	Numbers/credit_card_validator.py
	Numbers/distance.py
	Numbers/factorial.py
	Numbers/fibonacci.py
	Numbers/happy_numbers.py
	Numbers/next_prime.py
	Numbers/pi.py
	Numbers/prime.py
	Numbers/tax.py
	Numbers/tile.py
	Numbers/unit.py
	README.md
	Text/caesar_cipher.py
	Text/count_vowels.py
	Text/count_words.py
	Text/palindrome.py
	Text/piglatin.py
	Text/reverse.py
	Text/rss.py
	Web/page_scraper.py
	Web/time.py