Merge pull request #27 from mathetos/master

Miscellaneous CSS and Settings fixes
check for duplicate dev extensions
new attachment filters that are template specific
added a new help field

allow for backwards compatability
made settings metabox 100%
remove empty js
allow lightbox to be none
added new simple portfolio template
added field specific classname to each row
refactored class out
better field section styling
add Justified default template
changed help css
removed unwanted padding
hide help setting
updated field sections and titles
included missing ]
handle click properly
Get styles working with no anchor. Fixes #26
allow to pass custom attributes via args