Various updates of the planetlab install script.
Various updates of the planetlab install script.

* Implement hack to install PyCrypto on fedora.
* Follow redirects in curl.

Karthikeyan-kkk/ooni-probe,kdmurray91/ooni-probe,juga0/ooni-probe,juga0/ooni-probe,Karthikeyan-kkk/ooni-probe,lordappsec/ooni-probe,0xPoly/ooni-probe,lordappsec/ooni-probe,0xPoly/ooni-probe,Karthikeyan-kkk/ooni-probe,juga0/ooni-probe,kdmurray91/ooni-probe,kdmurray91/ooni-probe,0xPoly/ooni-probe,0xPoly/ooni-probe,juga0/ooni-probe,lordappsec/ooni-probe,Karthikeyan-kkk/ooni-probe,lordappsec/ooni-probe,kdmurray91/ooni-probe