Improve child handling#140

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rokroskar wants to merge 6 commits intopythonprofilers:masterfrom

rokroskar:improve_child_handling

Commits on Apr 5, 2017

improve handling of child processes; fix bug in plot_file for large number of children; refactor the profile file reading functions
rokroskar
committed

Commits on Apr 6, 2017

Commits on Apr 11, 2017

added parent process to dataframe; add df plot function
rokroskar
committed