add missing file uiConfig.js
add missing file uiConfig.js

change default attribute of 'if' and 'else-if' nodes to 'type' as this is probably the most useful one

refs #101

fbennett/csl-editor,adam3smith/csl-editor,adam3smith/csl-editor,adam3smith/csl-editor,citation-style-editor/csl-editor,citation-style-language/csl-editor,citation-style-language/csl-editor,fbennett/csl-editor,citation-style-language/csl-editor,citation-style-editor/csl-editor,citation-style-editor/csl-editor