Updated Travis to install IPython 1.0 (2.6 compatible)
Updated Travis to install IPython 1.0 (2.6 compatible)

vascotenner/holoviews,ioam/holoviews,ioam/holoviews,mjabri/holoviews,basnijholt/holoviews,mjabri/holoviews,vascotenner/holoviews,mjabri/holoviews,vascotenner/holoviews,ioam/holoviews,basnijholt/holoviews,basnijholt/holoviews