update web design of documentation
Merge branch 'master' of https://github.com/MTG/essentia
Removed old scons build system
further code clean-up in archivemusic extractor
changed essentia documentation design
small correction in BpmHistogram algorithm description
updated documentation pages "Introduction" and "Installation"
Merge branch 'master' of https://github.com/MTG/essentia

Conflicts:
	doc/sphinxdoc/installing.rst
Merge pull request #17 from hector/master

Fix documentation of "Design Overview"
moved some algorithms to the folders better related to their type

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more code clean-up in archive-music extractor
Merge branch 'master' of https://github.com/MTG/essentia
moved NoveltyCurve to rhythm folder
renamed FixedBpmEstimator to avoid mess as it should be used only with NoveltyCurve
documentation updates
fixed broken doxygen documentation
more updates to documentation
small fixed to the algorithms' description
moved beatogram related python scripts to examples/python/experimental
better simpler naming for extractors, moved some old extractors to examples/outdated