add 'default' and 'math' helpers

add documentation

Author: siordache

README.md

@@ -1,3 +1,35 @@
 ## Handlebars.java Helpers ##
 
-Helpers for Handlebars.java.
+This library provides various helpers for adding logic to [Handlebars.java](https://github.com/jknack/handlebars.java).
+Most of them are basic helpers that can be used as subexpressions in the built-in block helpers of Handlebars.java.
+This allows writing the templates in a fluent way.
+
+**Example**
+
+Given the following YAML model:
+```yaml
+birthYear: 1997
+```
+and the following template:
+
+```hbs
+{{def 'fifteenYear' (math birthYear '+' 15)}}
+{{#if (or
+        (and
+            (compare (math fifteenYear '%' 4) '==' 0)
+            (compare (math fifteenYear '%' 100) '!=' 0)
+        )
+        (compare (math fifteenYear '%' 400) '==' 0)
+       )
+}}
+Your fifteenth anniversary was in a leap year!
+{{/if}}
+```
+The resulting text will be:
+```
+Your fifteenth anniversary was in a leap year!
+```
+
+
+
+Please read the **[documentation](http://handlebars-java-helpers.beryx.org)** before using the handlebars-java-helpers library.

build.gradle

@@ -79,7 +79,7 @@ repositories {
     mavenCentral()
 }
 
-sourceCompatibility = 1.8
+sourceCompatibility = 1.6
 group = 'org.beryx'
 version = hbsHelpersVersion
 
@@ -116,17 +116,17 @@ dependencies {
   compile group: 'org.slf4j', name: 'slf4j-api', version: '1.7.20'
   compile group: 'ch.qos.logback', name: 'logback-classic', version: '1.1.7'
   compile 'com.github.jknack:handlebars:4.0.5'
-  
+
   provided 'com.google.code.findbugs:findbugs-annotations:3.0.1'
-  
+
   testCompile 'org.yaml:snakeyaml:1.17'
   testCompile('org.spockframework:spock-core:1.0-groovy-2.4') {
       exclude module: 'groovy-all'
   }
   testCompile 'cglib:cglib-nodep:3.2.1'
   testCompile 'org.objenesis:objenesis:2.2'
   testCompile('com.athaydes:spock-reports:1.2.10') { transitive = false}
-  
+
 }
 
 sourceSets.main.compileClasspath += configurations.provided
@@ -348,22 +348,22 @@ gradle.taskGraph.whenReady { taskGraph ->
 bintray {
     user = project.hasProperty('bintrayUser') ? project.getProperty('bintrayUser') : "unknownUser"
     key =  project.hasProperty('bintrayKey') ? project.getProperty('bintrayKey') : "unknownKey"
-    publications = ["handlebars-java-helpers"]
+    publications = ["hbsHelpers"]
     pkg {
         repo = 'maven'
         name = 'handlebars-java-helpers'
         userOrg = 'beryx'
         licenses = ['Apache-2.0']
         vcsUrl = 'https://github.com/beryx/handlebars-java-helpers.git'
-        
+
         version {
                 name = hbsHelpersVersion
                 desc = "Handlebars.java Helpers $hbsHelpersVersion"
-                released  = new Date().format("yyyy-MM-dd'T'HH:mm:ss.SSSZZ") 
+                released  = new Date().format("yyyy-MM-dd'T'HH:mm:ss.SSSZZ")
                 vcsTag = hbsHelpersVersion
                 gpg {
                     sign = true
                 }
-        }        
+        }
     }
 }

doc/docinfo.html

@@ -0,0 +1,12 @@
+   <!-- Histats.com  START  (aync)-->
+<script type="text/javascript">var _Hasync= _Hasync|| [];
+_Hasync.push(['Histats.start', '1,3473102,4,0,0,0,00010000']);
+_Hasync.push(['Histats.fasi', '1']);
+_Hasync.push(['Histats.track_hits', '']);
+(function() {
+var hs = document.createElement('script'); hs.type = 'text/javascript'; hs.async = true;
+hs.src = ('//s10.histats.com/js15_as.js');
+(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(hs);
+})();</script>
+<noscript><a href="/" target="_blank"><img  src="//sstatic1.histats.com/0.gif?3473102&101" alt="free html hit counter" border="0"></a></noscript>
+<!-- Histats.com  END  -->

doc/getting_started.adoc

@@ -1,5 +1,18 @@
 [[getting_started]]
 = Getting Started
 
-== Requirements
-TBD
+handlebars-java-helpers is available in Maven Central and JCenter.
+
+[subs="attributes",options="nowrap",title="Maven"]
+----
+<dependency>
+    <groupId>{project-group}</groupId>
+    <artifactId>{project-name}</artifactId>
+    <version>{project-version}</version>
+</dependency>
+----
+
+[subs="attributes",options="nowrap",title="Gradle"]
+----
+compile '{project-group}:{project-name}:{project-version}'
+----