Merge pull request #14 from tharindu99/master

index page changes and some core changes
graph library is added
finds the simple cycle in given graph
gets the all nodes and link to the servlet
problem solved finds the cycles faster now
finds the node with hight outdegree
finds the node with hight Indegree
automatically get the base url
errors has been resolved
two of methods has been implemented which was given in task list
Merge pull request #15 from gihantharanga/master

JGraphT library is added to project
sample buttion is added for indegree and outdegree
Merge pull request #17 from gihantharanga/master

sample buttion is added for indegree and outdegree
Merge remote-tracking branch 'upstream/master'