Add solve time and solve timestamp filters

• Merge branch 'add-after-before-options' fe38dc3
• Fix typo in readme copy 880a2fe
• Add documentation about the new options 0ff7d3f
• Print the before and after timestamps in stats command output 1d41bce
• Move imports to the top of the file d9e70bc
• Add makefile with test commands for stats 016caa4
• Remove redeclared helper function addda3b
• Move helper functions to a separate module 55105e0
• Add basic functionality for the --basic and --after options 9ac421c
• Include moment.js as a depedency for time-related functions eb42f84
• Change the current format to a validatorFunc format d72bc57
• Set solve timestamp even in the case of a DNF fa3367e
• Format commands in readme properly 87fdae1
• Add documentation about the new arguments 31833b4
• Fix the messages printed by the stats command 38629fa
• Add min and max options for the stats feature 81e476d

v1.2.0...v1.3.0