Updated peoples and contributons [skip ci].
Added more contribution info [skip ci].
De-allocated memory in buildhessian.
Improved for proper parsing of non-square sparse matrices [skip ci].
Merge branch 'devel' of github.com:prody/ProDy into devel
Turned logging messages off [skip ci].
Using multiple inheritance and super [skip ci].
Finalized RTB methods for building hessian and calc modes [skip ci].
Added RTB tests.
Added missing test data file.
Counting when Counter is not found in Py 2.6.
Fixed import issue in Py 3.
Fixed a value issue appeared in Py 2.6.