[libcommhistory] Removed CallProxyModel::getEvents() slot declaration

Its implementation was missing.
[libcommhistory] Removed MmsContentDeleter

It's hopelessly obsolete.
Merge pull request #93 from monich/getEvents

Removed CallProxyModel::getEvents() slot declaration
Bump version to 1.7.17
Merge pull request #94 from monich/MmsContentDeleter

Remove MmsContentDeleter
Bump version to 1.7.18
[libcommhistory] Added getter for commhistory database data dir
Merge pull request #95 from monich/dataDir

Added getter for commhistory database data dir
Bump version to 1.7.19
[libcommhistory] Move commhistory data dir getter to its own header

To avoid dependency on QSqlDatabase
[libcommhistory] Resolve event ContactGroup startTime to most recent

A ContactGroup (conversation) with multiple group objects uses startTime
timestamp from group object with OLDEST startTime.
Fix to use most recent startTime.
Otherwise startTime does not match to latestMessage and leads to wrong
conversation (group) startTime on UI.
Merge pull request #96 from monich/CommHistoryDatabasePath

Move commhistory data dir getter to its own header
Bump version to 1.7.20
Merge pull request #97 from tkenakka/jb24278-msgs-group-timestamp-broken

[libcommhistory] Resolve event ContactGroup startTime to most recent
Bump version to 1.7.21
[libcommhistory] Enable limiting for flat call model queries

It's easy to limit results for queries for call models which aren't
using tree mode, and limiting increases performance when the full
history isn't needed.
Merge pull request #98 from hmallat/flat-callmodel-limited-results

[libcommhistory] Enable limiting for flat model queries
Bunp version to 1.7.22
[libcommhistory] Add temporary limit property to call proxy model
Merge pull request #99 from jpetrell/calllog-limit

Add temporary limit property to call proxy model