Added std::string sprintf and number readability comma utility functions
replaced stringstream formatting with ssprintf in one page report
renamed erroneous x_axis_labels to y_axis_labels
updated version counter to 1.4.0_a1
iptree works
updated tree trimming
improved histogram operation
Time histogram labels cleaned up
Merge branch 'master' of github.com:simsong/tcpflow

Conflicts:
	src/iptree.h