improve analysis tool with additional data

[elf-alchemist]

Marc Rousseau's BSPInfo had a few additional data points i didn't originally consider

BSPInfo Version 1.3 (c) 1995-2004 Marc Rousseau

Analyzing: out.wad

          Max   Avg
         Depth Depth   FOM   Balance    Splits       Diagonals  Nodes  Segs
    E6M1:  37  20.2   0.557   0.569   941 - 18.9%  2019 - 81.6%  2474  5928
    E6M2:  36  20.2   0.501   0.049   511 - 19.4%   911 - 74.9%  1217  3141
    E6M3:  46  20.3   0.529   0.137   785 - 22.9%  1433 - 80.7%  1776  4217
    E6M4:  36  20.7   0.555   0.006  1136 - 19.5%  2496 - 86.3%  2893  6964
    E6M5:  38  18.5   0.628   0.060  1198 - 16.1%  2031 - 64.7%  3140  8652
    E6M6:  38  17.9   0.648   0.764   985 - 15.4%  2267 - 74.3%  3050  7397
    E6M7:  36  19.3   0.604   0.081  1155 - 14.9%  1857 - 57.8%  3215  8890
    E6M8:  45  20.1   0.567   0.242   999 - 19.4%  2256 - 85.6%  2635  6159
    E6M9:  35  18.8   0.559   0.557   378 - 10.1%   897 - 59.4%  1510  4128