Fixed detection of your class in arena mode

Fixes #497
Updater will now look for a GitHub repo called 'HearthStats-Companion'
This will allow us to change the name of the repo 'HearthStats.net-Uploader' in future so that it matches the new name 'HearthStats Companion'.

Both repo names will work while this code is in place. Once we've moved to the new repo name, this code can be removed.

Closes #498
Updated app icon to new HearthStats icon
Release v0.19.1
Updated app icon to new HearthStats icon
Fixed problem resetting the Current Match tab inbetween matches, which was causing the coin to be incorrectly reported in match popups.

Fixes #507
Merged the Deck Export Feature from master to v0.19 branch
(cherry picked from commit 5acb61ed32e08cf42ce6645cab759b03578733f1)
Added bringWindowToForeground method to ProgramHelper that brings the Hearthstone window to the front.
Added experimental 'Export Deck' button to the decks tab.
Makes use of the new deck export feature from @shyos. I've added OS X support (including for screen capture and for dealing with 'natural' scrolling which is the reverse of scrolling on Windows). The export does not yet actually export the deck to HearthStats.net, but it logs what would be exported so that we can test it.
Merge branch 'fixes-for-v0.19'

Conflicts:
	uploader/src/main/scala/net/hearthstats/HearthstoneMatch.scala
	uploader/src/main/scala/net/hearthstats/Monitor.scala
	uploader/src/main/scala/net/hearthstats/analysis/HearthstoneAnalyser.scala
Merge branch 'deckexport'

Conflicts:
	uploader/src/main/scala/net/hearthstats/ProgramHelper.scala
	uploader/src/main/scala/net/hearthstats/ui/DecksTab.scala
Merge branch 'master' of https://github.com/HearthStats/HearthStats.net-Uploader

Conflicts:
	uploader/src/main/java/zulu/deckexport/card/Card.java
	uploader/src/main/java/zulu/deckexport/card/CardCount.java
	uploader/src/main/java/zulu/deckexport/card/Deck.java
	uploader/src/main/java/zulu/deckexport/card/DeckItem.java
	uploader/src/main/java/zulu/deckexport/card/DeckItemImage.java
	uploader/src/main/java/zulu/deckexport/extracter/Constants.java
	uploader/src/main/java/zulu/deckexport/extracter/CropManager.java
	uploader/src/main/java/zulu/deckexport/extracter/ExtracterMain.java
	uploader/src/main/java/zulu/deckexport/extracter/LogicalDeckAlgorithm.java
	uploader/src/main/java/zulu/deckexport/extracter/PixelManager.java
	uploader/src/main/java/zulu/deckexport/prob/ProbList.java
	uploader/src/main/java/zulu/deckexport/prob/ProbListItem.java
	uploader/src/main/java/zulu/deckexport/util/Myrect.java