*** merged changes of front pages ***
* merged changes from '97suifang-front' by mjymjydark;
    and modified to work with django
* finished 'editing_data' div of 'SheetDefault' for add new record
* added 'indicator.views.ajax_add_record()'

*** search ***
* improved 'search' function of 'NewDeleteIndex' page;
    employ AJAX to load search results;
* added 'indicator.views.search_indicators()'

*** recommend indicator ***
* improved the functions of 'recommend_indicator'
* added 'sciblog.models.UserCollection' to record the collection
    information for each user
* improved 'sciblog.views.add_user_to_m2m()' to work with
    'UserCollection'
* added field 'lastRecommendTime' in 'indicator.models.UserIndicator'
* updated 'indicator.views.indicator_status' against 'recommend_indicator'

*** qtip2 for recommended indicator ***
* added 'qtip2' tooltip for recommended indicator card
* added '97suifang' qtip css (qtip-sf)

* added tooltip for 'add record' when return error (SheetDefault page);
* improved the style of 'collection_btn' and 'go_library_btn' of
    IndexDesc page;