Update compression type from gzip to zlib

Weechat changed the default keyword to zlib.  We should match this
change as well.
Add support for _nicklist_diff command

Weechat now sends diffs instead of full nicklist messages where
appropriate.  This was "forced" on clients in version 0.4.1-dev,
commit 86a8b9fb.

http://git.savannah.gnu.org/gitweb/?p=weechat.git;a=commitdiff;h=86a8b9fb
Replace WeeChat logo by the new one
Update pom.xml to work with latest android tools

aapt moved, so we need a newer version of the android-maven-plugin to
build properly.
Update weechat logo

Merge branch 'new-weechat-logo' of https://github.com/flashcode/weechat-android
See Pull Request #77
Update android-maven-plugin version to 3.6.0

Fixes compilation with r17 SDK, see:
https://code.google.com/p/maven-android-plugin/issues/detail?id=377
Merge pull request #78 from jspricke/maven-fix

Update android-maven-plugin version to 3.6.0
Fix build issue with JDK7

jarsigner from java 1.7 defaults to signing with an incompatible
algorithm.  This fixes that so builds are installable.
Move to gradle build system

Delete maven, move code around to conform better to the gradle way of
doing things.
Comment out gradle properties

These should be given as an example of what settings it looks for, but we don't want to actually use them during a build.
Update build icon to point to different CI server

Using my private builds on cloudbees instead of the public BuildHive system.  No reason to maintain both.
Gradle improvements

Add gradle wrapper
Specify gradle 1.7 for building.
Updated .gitignore file
Remove unused project.properties file
Update jsch library
Define relay-example as a runnable application
Update gradle wrapper to 1.8

Also update the android gradle plugin
Resolve NPE

NPE if changing preferences while not connected.
Show fingerprint instead of serialnumber

When connecting using ssl, show the key fingerprint instead of the
serialnumber.

Fixes #84.
Fixed the crash on opening a buffer
Merge pull request #86 from pvl1/master

Fixed the crash on opening a buffer
FIX #85
Request READ_EXTERNAL_STORAGE for key access
Merge pull request #92 from pvl1/master

Fixes #85.  Sorry for not merging this earlier; it's a no-brainer.  Thanks pvl1!
Update build files to the latest gradle/sdk/etc

And make sure that it actually builds properly