* provides a optional-plugin for tracking ignores enhancement(#1203)

* trace ignore plugin config support override by system.env

* optimize the trace ignore plugin and make normalization of pom

* add AntPathMatcher and an junit test for it

* No longer rely on the spring framework

* add license at file header

* rebuild pom and rewrite README

* rebuild optional-plugins pom

* clean up useless code

* modify junit

* rewrite the ant path match logic

* rename the matcher class

* add the trace ignore plugin introduce doc to incubating features menu.

* modify the README doc.

* remove Chinese in English doc.

* remove superfluous content of EN-doc.

* Update README.md