mobile styles added
mobile styles + new branch
Merge branch 'part3_task2' of https://github.com/katia-trifonova/sedona into part6_task3

Conflicts:
	index.html
bugs fixed
flex-order fixed
responsive images added
safari bug fixed
background bugs fixed
Merge pull request #3 from katia-trifonova/part6_task3

mobile styles + new branch