making symmetrization extensible.
Merge branch 'master' into social-summarizer

Conflicts:
	modules/components/social/src/main/java/org/wso2/carbon/social/ActivitySummarizer.java
fixing errors introduced while merging.
adding changes to display of ratings
Merge pull request #54 from splinter/fix-session-invalidated

Fix STORE-270 and STORE-236
30s for startingDelayInSeconds indexing
Merge pull request #55 from splinter/master

Fix STORE-241
Fixing sort by category (STORE-225)
Resolving STORE-277
Merge branch 'master' of github.com:wso2/enterprise-store
adding search from categorizes
implementing like summarizer.
Merge remote-tracking branch 'origin/master' into social-summarizer
refactoring store code
Merge branch 'master' of https://github.com/wso2/enterprise-store
adding solr schema xml
Merge branch 'master' of https://github.com/wso2/enterprise-store
dist updating for solr config
Merge branch 'master' of https://github.com/wso2/enterprise-store
revert commits solr config