Update wro4j to 1.8, fixed .jshintrc error, fixed Gson dependency error, improved RunnerJsHintProcessor

[wolfred24]

This PR closes

#1
#3

Upgrade the wro4j version and change the Gson dependency scope. Refactor the RunnerJsHintProcessor to improve resource file handling, error handling, and logging clarity.

Changes

• Now is possible to use the .jshintrc file functionallity to set the JShint options on any base or parent directory.
• Greatly improved execution logging.
• Fixed Groovy bug.
• Updated wro4j to version 1.8

New execution logging example

[echo] WRO File: wro.xml
     [echo] Context Folder: test_code_dir
     [echo] Config File: wro.properties
     [echo] ===============================
     [java] processing group: jshint-test.css
     [java] processing group: jshint-test.js
     [java] 
     [java] ========== Processing resource: /asi.js ==========
     [java] 
     [java] [JShint] .jshintrc loaded: /Users/cesar/Documents/developement/TS7700_MI/vtd-web/tools/wro4j/test/.jshintrc
     [java] [JShint] Using .jshintrc configuration in: /Users/cesar/Documents/developement/TS7700_MI/vtd-web/tools/wro4j/test/test_code_dir
     [java] [JShint] Options: esnext=true,strict=true,undef=true,unused=true,eqeqeq=true,curly=true,browser=true,node=true,devel=true,asi=false,maxerr=50.0,latedef=true,noarg=true,nonew=true,camelcase=true,quotmark=true,trailing=true,freeze=true,futurehostile=true,nocomma=true,varstmt=true
     [java] The following resource: ro.isdc.wro.model.resource.Resource@752325ad[JS,/asi.js,true] has 6 errors.
     [java] ro.isdc.wro.extensions.processor.support.linter.LinterError@b3ca52e[
     [java]   line=0
     [java]   character=0
     [java]   reason=Bad option: 'varstmt'.
     [java]   evidence=
     [java] ]
     [java] ro.isdc.wro.extensions.processor.support.linter.LinterError@45c7e403[
     [java]   line=3
     [java]   character=3
     [java]   reason=Missing "use strict" statement.
     [java]   evidence=  var x = 1
     [java] ]
     [java] ro.isdc.wro.extensions.processor.support.linter.LinterError@2925bf5b[
     [java]   line=3
     [java]   character=12
     [java]   reason=Missing semicolon.
     [java]   evidence=  var x = 1
     [java] ]
     [java] ro.isdc.wro.extensions.processor.support.linter.LinterError@710f4dc7[
     [java]   line=4
     [java]   character=12
     [java]   reason=Missing semicolon.
     [java]   evidence=  var y = 2
     [java] ]
     [java] ro.isdc.wro.extensions.processor.support.linter.LinterError@1ff4931d[
     [java]   line=5
     [java]   character=15
     [java]   reason=Missing semicolon.
     [java]   evidence=  return x + y
     [java] ]
     [java] ro.isdc.wro.extensions.processor.support.linter.LinterError@65e98b1c[
     [java]   line=2
     [java]   character=10
     [java]   reason='semicolonTest' is defined but never used.
     [java]   evidence=function semicolonTest() {
     [java] ]
     [java] Finished processing: /asi.js