code/history: Fix some bugs while showing author.

In a commit,
* Show only author's name if there is no user matches the name and
  author's email is not specified.
* Show anonymous as its author if both of author's email address and
  name is not specified.
add javadoc @ IssueApp
modify parameter name - userName -> ownerName
IssueApp: move excel download code into issues method
apply #153 : create the "member add" button for project members
add permission check @ the project member management page
fixed #175
fixed #183
fixed #176
fork-pull: i18nized the 'forked from' message
fix #179
appy #180 : now the due-date of milestone could be null
milestone view page: display remaining(or past) days
Merge pull request #185 from kjkmadness/doc/IssueApp

IssueApp javadoc
Merge pull request #186 from kjkmadness/enhancement/153

#153 적용 및 member 관리 페이지 권한 체크 추가
issue: change UI of issue status and search form
Merge pull request #174 from npcode/fix/commit-history-author

code/history: Fix some bugs while showing author.
fixed #178
Merge pull request #187 from doortts/issue#173

issue: change UI of issue status and search form
fileUploader has enhanced

* new UI applied
* Drag&Drop file to upload