Column aliases#1523

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changhiskhan wants to merge 3 commits intopandas-dev:masterfrom

changhiskhan:column-aliases

Commits on Jun 24, 2012

ENH: option to disable empty string conversion to NaN in file readers
Chang She
committed
ENH: column aliases for to_csv/to_excel #921
Chang She
committed

Commits on Jun 25, 2012

overload header keyword instead of extra col_aliases keyword
Chang She
committed