Update dependencies (issue #73)
Update dependencies (issue #73)

- com.sun.mail:javax.mail ............................... 1.5.2 -> 1.5.3
- junit:junit ............................................. 4.11 -> 4.12
- org.apache.commons:commons-lang3 ........................ 3.3.2 -> 3.4
- org.easymock:easymock ................................... 3.2 -> 3.3.1
- org.slf4j:jcl-over-slf4j ............................. 1.7.7 -> 1.7.12
- org.slf4j:slf4j-api .................................. 1.7.7 -> 1.7.12
- org.slf4j:slf4j-log4j12 .............................. 1.7.7 -> 1.7.12
- org.slf4j:slf4j-simple ............................... 1.7.7 -> 1.7.12
- org.springframework:spring-beans ...... 4.1.1.RELEASE -> 4.1.6.RELEASE
- org.springframework:spring-context .... 4.1.1.RELEASE -> 4.1.6.RELEASE
- org.springframework:spring-test ....... 4.1.1.RELEASE -> 4.1.6.RELEASE

Chessray/greenmail,marcelmay/greenmail,marcelmay/greenmail,buildscientist/greenmail,jianglili007/greenmail,chriswhite199/greenmail,greenmail-mail-test/greenmail,greenmail-mail-test/greenmail,chriswhite199/greenmail,marcelmay/greenmail,rucek/greenmail,buildscientist/greenmail,rucek/greenmail,marcelmay/greenmail,buildscientist/greenmail,Chessray/greenmail,rucek/greenmail,greenmail-mail-test/greenmail,marcelmay/greenmail,buildscientist/greenmail,jianglili007/greenmail,jianglili007/greenmail,Chessray/greenmail,rucek/greenmail,chriswhite199/greenmail,chriswhite199/greenmail,Chessray/greenmail,chriswhite199/greenmail,jianglili007/greenmail,buildscientist/greenmail