Feature: min estimates for histogram ranges

Adds an optional min_estimate parameter to compute_rspace_stats. This allows to specify the minimum of the histogram range, separately from the maximum. The read_histogram function is adapted to read the new parameter if it exists and use the previous default otherwise.

requested review from @chichi

assigned to @g-lbent

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• d32dd26d - Fixing computation of minimum value of positive quantity

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@chichi Please check that the read_histogram function is backwards-compatible as desired. Please also note lines 1164-1168 of field.cpp. I realized that previously, computed minima of TrS2 were always zero because the minimum was initialized with zero. Now, I'm initializing with positive/negative infinity, which should always work.

marked this merge request as ready

added 2 commits

• 68ee8f25 - fixes comparison warnings
• faa962ac - gets rid of explicit infinity assignment

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added 1 commit

• 015175ee - Remove minus sign from lowest()

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added 1 commit

• 2aa1e028 - fixes parameter handling

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merged

mentioned in commit 76134b99