1. pmd -> 6.15.0
2. idea min version 2016.1
3. jdk min version 1.8

1. pmd -> 6.15.0
2. idea min version 2016.1
3. jdk min version 1.8

fix typo

update new rules in readme

This fixes https://github.com/alibaba/p3c/issues/471

Previously, the following code can't pass EqualsAvoidNullRule:

public class Test {
  private static final String VERSION = System.getProperty("v");
  public boolean isJava6(){
    return "1.6".equals(VERSION);
  }
}

This PR fixes this issue by checking if the caller is a literal.

Update README.md

Update the number of rules for p3c.

Update README.md

LowerCamelCaseVariableNamingRule 和 StringConcatRule

Fixed #448

StringConcatRule: line130 注释掉  ======================================================================

correct method name

修复在en模式下，AbstractMethodOrInterfaceMethodMustUseJavadocRule的2处报错消息中，me…

修复在en模式下，AbstractMethodOrInterfaceMethodMustUseJavadocRule的2处报错消息中，method名称与param名称颠倒的问题、以及method名称与exception名称颠倒的问题。Fixes #440

typo:  阿里巴巴JAVA开发手册最新版->阿里巴巴Java开发手册最新版

eclipse-format关于方法注释的格式修改

eclipse-plugin 1.0.6
idea-plugin 1.0.6

性能优化，自定义类型解析对于每个java文件只处理一次

correct the typo for GAV term.

fix typo in example code

delete  package “marker”