Moved all logging statements to slf4j. Cleaned up exception logging. Upgraded to latest slf4j.
Replaced String.format placeholders in old log statements with slf4j-style {} placeholders
Removed more throws Exception statements and added additional logging statements for error conditions.
Merge branch 'master' into logger-cleanup
Syncing with HTTP PATCH support
Merge branch 'logger-cleanup' of https://github.com/jekh/browsermob-proxy into logger-cleanup

Conflicts:
	src/main/java/net/lightbody/bmp/proxy/ProxyManager.java
	src/main/java/net/lightbody/bmp/proxy/bricks/ProxyResource.java
Modified stand-alone proxy to use the JDK logging configuration file in conf/bmp-logging.properties.
Fixed copy/paste error
Merge pull request #116 from jekh/logger-cleanup

Logger cleanup