init mmap graph
initial version of mgraph
Use unique_ptr to fix some memory leaks
first merge graph io
graph api
retab
add sync function for explicit save
add influence maximization
fix format
clear counter
rm using std
more std removed
clear warning
Merge pull request #26 from pondering/inf-max

Implement Influence Maximization
merge mgraph, remove sample data

mgraph: add pointer types for {Edge,Vertex}Iterator
mgraph: add edge counts for VertexIterator
mgraph: added Clone interface
pagerank: use double instead of float
pagerank: added saedb as library dependency
merge pull request mgraph