add kmeans using samples
add random sampling
revise random sampling
update source code
revise BuildCodebook
add maxiter arguments
Merge branch 'master' of https://github.com/khoadoan/slda-hadoop

Conflicts:
	code/FeatureExtraction/src/main/BuildCodebook.java
update
add JoinCodebookTopic.java
modify JoinCodebookTopic
add convertSLDA.java
modify convertSLDA.java
modify codes
modeify convert slda
modify convert slda
modify convert slda
update
update
update
update