Treat "about:blank" as a normal empty page

The "about:blank" url is not shown to user. Instead,
we are showing the empty text.
Treat "about:blank" as a normal empty page

The "about:blank" url is not shown to user. Instead,
we are showing the empty text.
[sailfish-browser] Save empty default home page as "about:blank"
Merge pull request #215 from rainemak/emptyPageFix

Fix empty page handling
Cleanup url and title update sequence

In normal navigation cases, url and title are written to database
but callback is not triggered. DBWorker emits tabChanged
from DBWorker::goBack or DBWorker::goForward.

Conflicts:
	src/declarativetabmodel.cpp
Align tabmodel unit tests to previous commit
Merge pull request #214 from rainemak/cleanupUrlTitleUpdate

Cleanup url and title callbacks from database
Bump version
Fix lifecycle of live web pages

Conflicts:
	src/declarativewebcontainer.h
	src/webpages.cpp
fix failing test cases
[sailfish-browser] Do not send "memory-pressure" to engine

Let gecko to do gc'ing when needed. Sending "memory-pressure" this
frequently (in common use cases) cause unnecessary page faults. In
addition, this looks to be leading to a higher memory consumption.
Merge pull request #217 from rainemak/avoidMemoryPressure

[sailfish-browser] Do not send "memory-pressure" to engine
Fix debug logging
Merge pull request #216 from rojkov/webpagequeue

Fix lifecycle of live web pages
Disable also "javascript.options.gc_on_memory_pressure" preference

Currently this is not doing anything as we are not sending memory
pressure. Still better to disable for now.
Merge pull request #218 from rainemak/memPresure

Disable also "javascript.options.gc_on_memory_pressure" preference
Bump version
Add more data for memory dump reader

"explicit/gfx/heap-textures" included in summary and summary
section includes now description text.
Do not use StrictHostKeyChecking with dumpMemoryInfo
Merge pull request #219 from rainemak/moreMemoryDump

Add more data for memory dump reader