pom update and jar path improvements.

@eprogramming  you tested this in linux or windows? i'm trying to use this with windows( 8.1 ) and not working so far, i don't have linux in this computer yet, so i don't know if there is any problem in other SO
if i use with the old way works fine.
```java
jar = thisClass.getResource("/" + System.getProperty("java.class.path"));
```