remove hardcoded signature header naem (i.e., Authorization) for
updating signagure.

clean debug info.
1. change names of udpater class from ***headerUpdater to ***sigUpdater
2. add one more updater class that append sig to url intead of in a
request header
3. add one more attribute in config file: client-id
Push new updater classes
Merge branch 'master' of https://github.com/paulur/spec.git

Conflicts:
	burp_extender/sos_burp/src/spec/extender/hmac/updater/HeaderUpdaterFactory.java
	burp_extender/sos_burp/src/spec/extender/hmac/updater/SOSHeaderUpdater.java
	burp_extender/sos_burp/src/spec/extender/hmac/updater/UpdaterUtil.java
	burp_extender/sos_burp/target/hmac-extender.jar