Added a function for getting url metadata on book level.
Suppress invalid value warnings for cosine computations.
Added __init__ file.
Merge branch 'master' of github.com:inpho/vsm
Changed Cosine label to Value.
Updated the imports to reflect the structural changes.
Added isomap function to beagleviewer. Partially refactored isomap functions from ldagibbsviewer.
Merge branch 'master' of https://github.com/inpho/vsm
Added htrc label function that includes book links.
Merge branch 'master' of github.com:inpho/vsm
Changed book link to open in new tab.
Bug fix in setup.py (wrong extensions path)
Merge branch 'master' of https://github.com/inpho/vsm
Moved extensions to vsm.extensions.
Resolving conflicts from merge from master