fix(markers): Solved a critical bug not rendering any markers. Thanks…

… to @juanmanavarro for reporting here:

#1017

fix(grunt): Removed old and unneeded grunt tasks

fix(grunt): Solved a bug with the grunt chain of project construction

No need for version number on package.json

fix(construction): Added semantic-release to devDependencies of packa…

…ge.json

0.9.1

Version 0.9.0

Version 0.8.8

Version 0.8.7

Version 0.8.6