Added adjacency spectral embedding, SVD of the somewhat modified adjacency matrix.
Adjacency spectral embedding: always determine NCV automatically.
R: added interface to adjancency spectral embedding.
Adding Python interface to adjacency spectral embedding.
Adjacency spectral embedding takes a vector for augmentation now.
Merge branch 'develop' of github.com:igraph/igraph into develop
Merge branch 'develop' of github.com:igraph/igraph into develop

Conflicts:
	src/Makefile.am
Added scan-1 function, the number of adjacenct triangles plus the degree, essentially.
Merge branch 'develop' of github.com:igraph/igraph into develop

Conflicts:
	interfaces/functions.def
Added approximate scan-1 computation, using eigenvectors.
Added Python interface to scan functions and eigen_adjacency.
Added an R test case for scan-1.
Merge branch 'develop' of github.com:igraph/igraph into develop
Merge branch 'develop' of github.com:igraph/igraph into develop

Conflicts:
	include/igraph.h
	src/Makefile.am
Merge branch 'develop' of github.com:gaborcsardi/igraph into develop
Generate graphs from a stochastic block model (#2).

Conflicts:
	src/Makefile.am
C and R docs for stochastic block model generator (#2).
R: don't need to do ./bootstrap.sh to create an R package.
R: fix SBM manual page, had non-ascii character.

And R CMD check is sensitive for that.
R: eliminate a NOTE about a non-visible binding.