fix NPE in CacheManage#cacheStatus() (fixes #51)

(cherry picked from commit ce428e604985fbb929d46f0e36a07a3954a94a2a)

Conflicts:
	elnetw-core/src/main/java/jp/syuriken/snsw/twclient/CacheManager.java
fix NPE in UserInfoFrameTab.getBioHtml() (fixes #58)

(cherry picked from commit 1b4f63406e2279371ea9414367e3c995c5a7581f)
NPE when mouse exited from overlay label with text==null (fixes #44)

(cherry picked from commit 53ed6c599c830f32de69639d5b92db71ca824995)
[release.sh] release version 0.1.2
[release.sh] prepare for 0.1.3-SNAPSHOT