Add spectra, lightcurve and database to brief tour
Fixes to add spectra and such
Merge pull request #706 from CyclingNinja/documentation_sprint

Add spectra, lightcurve and database to brief tour
Add anaconda install section to windows docs
improve the install documentation
tidying up
more tweaks
More tweaks to install and trying to fix latex bugs
Add Xcode note to mac.rst
fix typo
link back from platform anaconda instructions
make database from astropy module
revert to original database api docs, they work with latex @derdon
suggest that the user really does want to install the optional deps
Reword Xcode in main install