general tools for used in other apps
* moved 'templatetags' from 'apps/indicator' to 'apps/utils'
* '.gitignore' to ignore 'fixtures_bak'
* moved js plugins from 'apps/indicator/static/plugins' to
  'staticfiles/plugins'

apps/recommend:
* updated 'recommend.models';
    o commented 'recommend.models.ResearchCombination' (not used)
* implemented views 'add_edit_blog_info' and 'ajax_add_edit_configs';
* added pages 'templates/recommend/add_edit_blog_info.html',
    'add_edit_blog_info_error.html';
    o related css and javascripts files
* added 'tools.py';

* added 'utils/tools.py' for placing generic functions;
* deleted 'initial_data.json' (mv 'fixtures' to 'fixtures_bak');
* small fixes to 'indicator.models', 'sciblog.models' and
  'sfaccount.views'

* fixed automatically show 'proper_nouns' annotation in blog:
  recovered the line 'import signals' in 'sciblog.models'
* added 'is_ok()' method for 'recommend.models.ResearchConfig';

* 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;