clearly defined 'slf4j-api' dependency
update esapi dependency 'optional' element = true
maven-clean-plugin version update to 2.6.1
maven-compiler-plugin version update to 3.2
maven-javadoc-plugin version update to 2.10.1

dependencyManagement add logback-core logback-classic logback-access
logback-ext-spring 

add feilong-tools-log4j module

(deprecated) feilong-tools-html module 
feilong-ssh module (will restructure)
feilong-spring module (will restructure)

remove some repeated dependency ,some dependency add 'optional'=true