add 'navbar-text' bootstrap element

separate 'divider' bootstrap element
correct some other specs
correct Readme
release v1.0.0
correct name_generator according to new simple-navigation
release v1.0.1
Merge branch 'refs/heads/master' into navbar_text

Conflicts:
	lib/simple_navigation_renderers/bootstrap.rb
moved glyphicon option check inside hash condit'n