Merge pull request #59 from haibt/default_layout

Complete to change plugin's layout to Redmine's default layout
Merge pull request #61 from haibt/default_layout

Default layout
fixed bugs screen new issue,create issue,edit issue,change status issue,sort issue
filter on screen boards
filter on screen list
close issue on screen list
show progressbar after close and change sprint issues
change name action filter_issues_onlist and filter_issues_onboard to filter_issues
fix error can't change status issue after create on screen board
remove bottstrap
review and optimize code
init controller for Issue actions
show,update and datele issue on board
edit funciton comment
continue working ..
add comment to issue
fix errordo not show detail
function add comment
add file
fix error confirm when delete issue and comment