create topic_clustering service structure
refactor top topic service structure
Add services for top topic, topic network and hashtag/topic heat map
version update to 0.6
Config class is now parametric, the path of the properties file is a parameter of the initialize method
minor bug fixes
Merge branch 'release/0.6'

version update to 0.6
Config class is now parametric, the path of the properties file is a parameter of the initialize method
minor bug fixes