Documentation and some .gitignore updates

.gitignore

-/temp
-/lib
-/ext
-/build
-/keystore
-/*.zip
-/gitblit.properties
-/users.properties
-/site
-/git
-/target
-/build.properties
-/war
-/*.war
-/proposals
-/*.jar
-/federation.properties
-/mailtest.properties
+/temp
+/lib
+/ext
+/build
+/keystore
+/*.zip
+/gitblit.properties
+/users.properties
+/site
+/git
+/target
+/build.properties
+/war
+/*.war
+/proposals
+/*.jar
+/federation.properties
+/mailtest.properties
+/.settings/*.prefs
+/src/WEB-INF/gitblit.properties
+/bin/
+/.settings/

distrib/gitblit.properties

 # Example global regex substitutions
 # Use !!! to separate the search pattern and the replace pattern
 # searchpattern!!!replacepattern
+# SINCE 0.5.0
 regex.global.bug = \\b(Bug:)(\\s*[#]?|-){0,1}(\\d+)\\b!!!<a href="http://somehost/bug/$3">Bug-Id: $3</a>
+# SINCE 0.5.0
 regex.global.changeid = \\b(Change-Id:\\s*)([A-Za-z0-9]*)\\b!!!<a href="http://somehost/changeid/$2">Change-Id: $2</a>
 
 # Example per-repository regex substitutions overrides global
+# SINCE 0.5.0
 regex.myrepository.bug = \\b(Bug:)(\\s*[#]?|-){0,1}(\\d+)\\b!!!<a href="http://elsewhere/bug/$3">Bug-Id: $3</a>
 
 #
 #
 # SINCE 0.6.0
 mail.username =
+# SINCE 0.6.0
 mail.password =
 
 # from address for generated emails