Implemented the return of unique files for storage

requirements.txt

@@ -1,23 +1,10 @@
-appdirs==1.4.3
-beautifulsoup4==4.8.0
-bs4==0.0.1
-certifi==2019.9.11
-chardet==3.0.4
-cssselect==1.1.0
-fake-useragent==0.1.11
-idna==2.8
-lxml==4.4.1
-parse==1.12.1
-Pillow==6.2.0
-pyee==6.0.0
-Pygments==2.4.2
-pyppeteer==0.0.25
-pyquery==1.4.0
-requests==2.22.0
-six==1.12.0
-soupsieve==1.9.4
-tqdm==4.36.1
-urllib3==1.25.6
-urwid==2.0.1
-w3lib==1.21.0
-websockets==8.0.2
+bs4
+certifi
+lxml
+Pillow
+requests
+soupsieve
+urllib3
+urwid
+w3lib
+websockets