Merge pull request #92 from Smurph82/master

Get writable database instance not just a readable one
Move the logs and settings into a separate database, to prevent database locks by su binary.
The policy database, for the most part, should just be read only.

Change-Id: I90de7496bbe68eb37f0ecf8c8bdf3ed08a3bc8c1
fix up some db churn by reusing a single db connection

Change-Id: I2fd61d43331cd5014cde888a18b0c14d47fcc149
db refactorings

Change-Id: I19a1f067f0c59517afaeaf844621de5409f9c24e
purge logs over 2 weeks.

Change-Id: I2ebb2176d80d1e899548de9cb2f2c57c21e10ce3
Update README.md
update whatsnew

Change-Id: If23eaeedab8f25c091b5d6105fa555214c3097d8
Update README.md
Update values-zh-rCN/strings.xml

Minor tweak to string item "disabled".
Update values-zh-rSG/strings.xml

Minor tweak to string item "disabled".
Merge pull request #94 from huawuxin/patch-4

Update values-zh-rSG/strings.xml
Merge pull request #93 from huawuxin/patch-3

Update values-zh-rCN/strings.xml
send the binary version in the protocol, so a notification can be shown if it is out of date

Change-Id: I7d7e0903c23f2dc8ad29470e6fe1eb2b4367e689
send the binary version in the protocol, so a notification can be shown if it is out of date

Change-Id: I08cea8cd64f1ccdcf0e53191eb483fc1aef46608