[SAFS]: skip whitespace in reading RAID config file.
cmake checks GCC version
[Graph]: don't maintain in-memory graphs in FGlib.cpp.
[Graph]: add graph transitivity in FlashGraphR.
[Graph]: construct a graph from gzip'd edge list file directly.
[Graph]: generate compressed vertex index by default.
[Graph]: remove unused code.
[Graph]: verify generated graphs with compressed index.
[Graph]: release test verifies the generated graphs.
[Graph]: support both in-mem and ext-mem graph generation.
[Graph]: read and process gziped edge list file one buffer at a time.
[Graph]: define STXXL_PARALLEL_MODE_EXPLICIT in utils.cpp
[Graph]: reduce the library dependency.
[Graph]: fix a bug in utils.cpp.
[Graph]: enable stxxl and zlib in Makefile by default.
[Graph]: fix a minor bug in el2al.
[Graph]: fix a bug in verifying generated graphs.
[Graph]: fix a bug in verifying generated graphs.
[Graph]: use a larger buffer to verify a generated graph.
[Graph]: measure timing of verifying a graph.