change button to my_btn.xml
change WorldModel.mdl, and p to 40

because previous WorldModel file was trained by different format mfcc,
this will cause data error.
confirm first run, whether is needed to overwrite WorldModel
add drawable resource, and layout button
Merge branch 'dev' into displayment
change button style
add ignore for libs/
add developer activity and init some controls
can record 30s and 10s
set singleTask and MainActivity button Visiblity
add numerical password module
password check length bigger than 4, and change english tips to chinese
version 1.1.4

Signed-off-by: nigel0913 <nigel0913@gmail.com>