Make it easier to compare results

[LorenaH84]

Create the ability for users to easily compare results. This could be done in multiple ways:

1. Local storage - make sure that users can input previous results (Issue Add file input feature for results #46 ) and add them to the line plots.
2. Temporary storage on server - create a good results management/storage system so that a user can choose to temporarily store a result (as long as they are using the app), and at the same time add any new result to the temporarily stored result in the same line plot.
3. Definite storage on server - this would require a log in system and an improved database system. Users can then store their results in their own account and plot them as they like.