update proguard to keep com.fndroid.epdControlApi
support opening *.zip file.
Merge pull request #30 from qiujiejun/master

support opening *.zip file.
Merge pull request #31 from onyx-cap/master

Add Polish translation.
Merge pull request #32 from onyx-cap/master

fixed the crash problem in FBReader search; fixed compilation error of the strings resources.
close TTS by back button if TTS is running.
Merge pull request #33 from androidli/master

close TTS by back button if TTS is running.
commit modify by others