added force parameter handling on Mojo configuration as described by
dfernandez79
https://github.com/marceloverdijk/lesscss-maven-plugin/issues/6#issuecomment-6767883
Added node executable path to NodeJsLessCompiler constructor
bump lesscss lib version to 1.5.1
changed version to 1.5.1.1-SNAPSHOT
Integrated lessees 1.6.1.0.0.0 and fixed test cases
Merge branch 'master' of https://github.com/mederel/lesscss-maven-plugin
Merge branch 'develop' of https://github.com/taichi2000/lesscss-maven-plugin
for pull request #25

Conflicts:
	src/main/java/org/lesscss/mojo/CompileMojo.java