[slf4j-dev] [qos-ch/slf4j] 25aba2: prepare release 1.7.21

[Ceki Gulcu]

  Branch: refs/heads/master
  Home:   https://github.com/qos-ch/slf4j
  Commit: 25aba2ea4febeb35ba910c249826b5a62001a7e4
      https://github.com/qos-ch/slf4j/commit/25aba2ea4febeb35ba910c249826b5a62001a7e4
  Author: Ceki Gulcu <ceki at qos.ch>
  Date:   2016-04-04 (Mon, 04 Apr 2016)

  Changed paths:
    M integration/pom.xml
    M jcl-over-slf4j/pom.xml
    M jul-to-slf4j/pom.xml
    M log4j-over-slf4j/pom.xml
    M osgi-over-slf4j/pom.xml
    M pom.xml
    M slf4j-android/pom.xml
    M slf4j-api/pom.xml
    M slf4j-api/src/main/java/org/slf4j/LoggerFactory.java
    M slf4j-ext/pom.xml
    M slf4j-jcl/pom.xml
    M slf4j-jdk14/pom.xml
    M slf4j-log4j12/pom.xml
    M slf4j-migrator/pom.xml
    M slf4j-nop/pom.xml
    M slf4j-simple/pom.xml
    M slf4j-simple/src/test/java/org/slf4j/helpers/SimpleLoggerMultithreadedInitializationTest.java
    M slf4j-site/pom.xml
    M slf4j-site/src/site/pages/news.html

  Log Message:
  -----------
  prepare release 1.7.21