[BUG] - Sphere and Sphere SDDR post-processing is currently broken

[dodu94]

Describe the bug
Sphere and Sphere SDDR benchmarks post-processing for comparison is currently broken. One reason is probably the different behaviour of pandas across different python releases. There may be other additional issues though

To Reproduce
compare two different libraries on the Sphere benchmark

Expected behavior
post-processing should end gracefully

Desktop (please complete the following information):

• OS: Linux
• Version: Linux branch
• Python version 3.7

[alexvalentine94]

Sphere single now restored as well as comparison cases (see #255 ). Sphere SDDR also now includes full original functionality. Example outputs from Linux branch:

[alexvalentine94]

Examples from SphereSDDR also now restored. Atlas (now Word only) also replicates previous behavior - example below is for sphere leakage. Also included is new sheet added for reporting number of standard deviations from the mean of reference library.