Cleaned a bit and added max option
improved the way the checkboxes can render
Append already defined attr class with horizontal_input_wrapper_class, instead of replacing it
Merge pull request #963 from stellalie/patch-1

[BUG] Append already defined attr class with horizontal_input_wrapper_class, i...
added help block popover and tooltip too
Fix type in help block.. help_label_popover => help_block_popover