Malformed links on plugin documentation

[rbndm]

Looks like it is adding a # on the wrong place

Introduction:

• proguard:proguard parameters is https://wvengen.github.io/proguard-maven-plugin/#proguard-mojo.html and should be https://wvengen.github.io/proguard-maven-plugin/proguard-mojo.html
• Same for options and proguardInclude links

[lasselindqvist]

I'd be happy to merge a PR related to this. Otherwise I will fix it when I find time to test it.

[rbndm]

I'd be happy to help too -I am user of this fantastic project-, but I am not sure if I will find a spot. Anyway, I am not urging you to solve it. I was only my humble contribution to the project. If I can give a hand, I'll send that PR.