Merge pull request #77 from BorisVerk/master

Cleaned up repo, removed un-needed sections in server code
api 3 with Slope One Algorithm with k=20
added reduced deviations csv + postgressql
uncommented the apiv2 distances data
Merge pull request #80 from neillobo/feature/apiV3

Feature/api v3 with the slope One algorithm and k=20
switched v2 endpoint for user to v3
Merge pull request #81 from neillobo/fix/v3

switched v2 endpoint for user to v3
sending the top most recommendation
Merge pull request #82 from neillobo/fix/topMost

sending the top most recommendation
fixed duplicates
removing extraneous comments
added comments for api v3 function
because commented code bothers boris
Merge pull request #85 from neillobo/fix/duplicate

Fix/duplicate