bug 18909
   Update script for tracking github repo.

[git-p4: depot-paths = "//depot/software/assembly/cpp/": change = 125066]
   bug 18909
   Fix an int flow bug which occurs when aligned position in the genome is 
   greater than maximum int.

[git-p4: depot-paths = "//depot/software/assembly/cpp/": change = 125118]
   bug 18909
   Update blasr and pls2fasta so that they can handle plx.h5 file now. 

[git-p4: depot-paths = "//depot/software/assembly/cpp/": change = 125390]
   bug 23612
   Update pls2fasta description.

[git-p4: depot-paths = "//depot/software/assembly/cpp/": change = 125487]
   bug 21013
   Affected executables print start & end time info to stderr by default.

[git-p4: depot-paths = "//depot/software/assembly/cpp/": change = 125489]