Remove the remove saved search long press dialog in TrendsPage
Harmattan: add postrm to remove database & thumbnails after uninstalled
Fix some bugs in DM

* DirectMessage.insertDM() function use "newer" type instead of using
reloadType, which may not be "newer"
* When a DM delete response received from streaming, it will be remove
from DMThreadPage as well
* When new DM received and in DMThreadPage, that thread will not marked
as unread
* Correct some spelling error in UserStream.js
Coding improvement

* Cache.qml: Add/improve storeHashtags() and storeScreenNames()
functions
* DirectMessge.qml & TweetListView.qml: Improve refresh() and
onParseComplete() functions
* NearbyTweetsPage.qml, TweetSearchColumn.qml & UserSearchColumn.qml:
Improve refresh() functions
Merge pull request #7 from hugovk/master

Made some English language improvements
Merge branch 'master' of https://github.com/dicksonleong/Tweetian
Fix non-ASCII hashtags are not linked in rich text

Use a new algorithm which use indices to replace the hashtags
Fix last update for DM is not updated after refresh
Remove pull down to refresh gesture in UserCategoryPage
Fix screen names cache not populated from Timeline/Mentions