Fix for I-127741 (https://appirio.my.salesforce.com/a3v50000000CojA)
Add technologies and platforms filter in get challenge rss api.
Merge pull request #356 from Ghost141/rss_fix

Add technologies and platforms filter in get challenge rss api.
S-262899 added validator.
Merge branch 'dev' of https://github.com/cloudspokes/tc-api into dev
Update search srm challenges api

1. Switch database from topcoder_dw to informixoltp.

2. Update api doc.
Merge pull request #357 from Ghost141/srm_api_update

Update search srm challenges api
timeout: 10m -> 4m
Merge branch 'kohata-i-127741-api-timeout' into technology-2014-10-02
Merge branch 'technology-2014-10-02'