implement calculation of balance functions#1

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vks wants to merge 19 commits intoMADAI:masterfrom

Commits on Oct 20, 2014

Commits on Oct 21, 2014

implement calculation of balance function
vks
committed

Commits on Oct 23, 2014

calculate balance function correctly
vks
committed

Commits on Oct 24, 2014

calculate balance function ignoring species
vks
committed

Commits on Oct 30, 2014

fix balance functions
vks
committed

Commits on Oct 31, 2014

choose slightly small bin size for balance functions
vks
committed

Commits on Nov 3, 2014

Commits on Nov 6, 2014

Commits on Nov 10, 2014