Issue#157: Now when we check "Use Sms Portals" option application send messages throuh installed Sms Portal packages.

Conflicts:
	smssync/src/main/java/org/addhen/smssync/Prefs.java
	smssync/src/main/java/org/addhen/smssync/Settings.java
	smssync/src/main/java/org/addhen/smssync/messages/ProcessSms.java
minor changes to sms portals settings.

made summary more concise and variable naming more consistent.

doc updates coming soon.

Conflicts:
	smssync/src/main/java/org/addhen/smssync/Settings.java
	smssync/src/main/res/values/strings.xml
	smssync/src/main/res/xml/preferences.xml
Issue#182: added sms-portals and modified gradle to build flavors
Added missing bracket. Changed tabs for space chars.
Merge pull request #195 from KamilKalfas/issue-182

Fixes #182 Add support for sms-portal