now use task4.py to compute the vip of thethe overall graph
task 1-3 can output their results onto database
download the dataset as an adm file. see db_admconverter.py
add task5: extract part of a large graph; txt ouput OK, no DB output yet
Merge branch 'master' of https://github.com/songsense/Pregelix_Social_Graph
Task 5: still has problem on the marginal vertices even using edge increment method
task 5: heap overflow when sending msg in the last iteration
task 5: main issue solved
task5: add database output; modified REST api as AQL changes
add bootstrap.py
add a runAllTasks.py for backend to run the all the tasks together
task 5
Merge branch 'master' of https://github.com/songsense/Pregelix_Social_Graph

* 'master' of https://github.com/songsense/Pregelix_Social_Graph:
  add a runAllTasks.py for backend to run the all the tasks together
  add bootstrap.py
fixed a bug of run all tasks scripts
change ADMParser method to adjust to new ADM format
Merge branch 'master' of https://github.com/songsense/Pregelix_Social_Graph

* 'master' of https://github.com/songsense/Pregelix_Social_Graph:
  fixed a bug of run all tasks scripts
fix another local variable bug of task4.py
fix a bug of db_admconverter.py
fix a bug for task 1 output
Merge branch 'master' of https://github.com/songsense/Pregelix_Social_Graph

* 'master' of https://github.com/songsense/Pregelix_Social_Graph:
  fix a bug of db_admconverter.py
  fix another local variable bug of task4.py