mod_menu: remove DEBUG statement.
m_rsc: added 'is_published_date' property to easily check if a rsc is published and in its set publication date range.
prive_skel_blog: remove template leftover

fixes #658
Merge pull request #659 from ArthurClemens/priv_skel_blog_prevnext

prive_skel_blog: remove template leftover
docs: explanation about the use of quotation marks.
doc: correcting some quotes into curly quotes.
doc: backticks around state name, it is a state, just like the other states.
doc: show states as strings, as suggested by @andreas
mod_menu: added filter 'menu_is_visible'.
Also some minor doc corrections.
mod_admin: make it possible to replace the find/insert category list with another template.
core: remove debug statement from z_acl.
core: move rsc property access check inside  p/3 instead of the model access.
Add release notes for 0.9.3
(cherry picked from commit 6347d36c92f34c1f7fc1278347138c61d2e72649)
scripts: Add R16B01 and R16B02 to travis.yml config
scripts: Fix Travis-CI

They only support R16B

http://about.travis-ci.org/docs/user/languages/erlang/
scripts: Also test release-0.9.x on Travis-CI
mod_admin: Remove warning in m_admin_blocks
mod_admin(_frontend): more flexible tinymce initialization; enables different options per category in the admin frontend.
mod_base: ensure that the 'sizename' argument is safe to use directly in the templates.
mod_admin: select new-rsc dialog tabs with config key