Changes in version 0.0.7
o   Tests for "try-error" improved
o   Test to make sure the last iteration enforces any normalization/closure
    modified
Changes in version 0.0.6
o   Moved examples_chemo.zip within package
o   Changed function calls to nnls to nnls::nnls() 
Changes in version 0.0.5
o   Better compression obtained by using R CMD build --resave-data
o   Added dependence on R 2.10 
Changes in version 0.0.4
o   Thanks to Jan Gerretzen, a bug that appears when 
    (normS > 0 && normS != 1) is removed.