Triangle count

Implements streaming triangle counting algorithm by Madhav Jha et al.
Computes also transitivity.
Reading graphs with generic ids
review fix: deleting quotation mark in readers
Minor fixes after review:

Implemented input errors handling.
Style fix.
pankaj review fixes
Division of sample graphs into smaller chunks

This commit enables concurrent read of sample graphs.
Merge pull request #75 from szymonm/SampleFilesDivision

Division of sample graphs into smaller chunks
Merge pull request #71 from szymonm/ReadingStringGraphs

Reading graphs with generic ids
Tunning parameters on 100 runs
Merge pull request #62 from szymonm/TriangleCount

triangle count - alpha version #49
Writing graph to multiple files
Tool to convert list of edge to adjacency list
Tool to convert list of edge to adjacency list
Review fixes

* Move ListOfEdgesToAdjacencyListConverter to examples
* Spell check
Merge pull request #76 from szymonm/writeGraphInChunks

Writing graph to multiple files
default extension fix
Added a new example graph with sparse node ids (max node id is 90M)
Merge pull request #78 from szymonm/extensionFix

default extension fix
Yourkit usage acknowledgement
Merge pull request #82 from szymonm/yourkitAck

Yourkit usage acknowledgement