* Installation documentation refactor

* Remove the extra install links from the homepage

* Restore pics

* Rename css extension to suppress warning

* Fix install is not a toctree so is not indexed

* Fix multiple labels with same name

* Fix stdint.h link

* Remove reference to old GCC download instructions

* Fix colors

* Fix installation instructions

* Fix troubleshooting

* Fix broken link in dev_start_guide

* Prevent doc generation script from using GPUs

* Add numpy and scipy max version

* Remove Canopy references

* Fix script fails if THEANO_FLAGS is not set

* Add warning for deprecation of the old backend + minor changes

* Default env_th_flags should be an empty string

* Remove PYTHONPATH reference from doc, add libgpuarray options first

* Add static link to the dev installation instructions

* Fix syntax of link