Fixed issue #37 (create .stop file only if job is running)
Set new snapshot version
Updated aws-maven plugin
Sitemap resolution now stops when a stop request is issued (github #38).
Merge branch 'master' into develop

Conflicts:
	norconex-collector-http/pom.xml
	norconex-collector-http/src/changes/changes.xml
	norconex-collector-http/src/main/java/com/norconex/collector/http/HttpCollector.java
	norconex-collector-http/src/main/java/com/norconex/collector/http/crawler/HttpCrawler.java
	norconex-collector-http/src/main/java/com/norconex/collector/http/sitemap/ISitemapsResolver.java
	norconex-collector-http/src/main/java/com/norconex/collector/http/sitemap/impl/DefaultSitemapResolver.java
	norconex-collector-http/src/site/markdown/download.md.vm