Minor fix in engines doc: elapsed_time -> elapsed_seconds
fix a documentation bug in using.dox as pointed by jeff zhang
Merge pull request #93 from dbickson/master

fix a documentation bug in using.dox as pointed by jeff zhang
added a comment about unnormalized pagerank results
Merge pull request #94 from dbickson/master

added a comment about unnormalized pagerank results
Merge pull request #87 from iglesias/master

Minor fix in engines doc: elapsed_time -> elapsed_seconds
fixed a bug when reading initial vector from file in svd, added prediction support for svd
Merge pull request #95 from dbickson/master

fixed a bug when reading initial vector from file in svd, added predicti...
cleaned svd output to use two output files (for matrices U and V)
cleaning svd output generation and simplying documentation
Merge pull request #96 from dbickson/master

cleaning svd output and improving and simplifying documentation
finally removed transform_vertices call
Merge pull request #97 from dbickson/master

finally removed transform_vertices call
merge upstream 0b252a0
refine output