Merged r10294 from trunk.
Updated 1.4 CHANGELOG.
Merged r10148 from trunk.
Parse any heading level (#11789).
remove redundant empty lines from revision_graph.js
replace tab to space at revision_graph.js
show JQuery datepicker today button
Traditional Chinese translation updated by ChunChang Lo (#11766)
Merged r10287 from trunk to 2.0-stable
fix redmine_plugin generator output in USAGE.