Tweak intent-filter mimeType

First, mimeType support wildcards, so announce we can handle "text/*".
Secondly, some mail-attachments i receive are text but are classified as
application/octet-stream, so add that, too, so i can view them.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
bump version to 0.1.9b0

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
application: Set allowBackup explicitly

Allow to backup user preferences.
This setting is on per default but lint complains if you rely on the
default and not specify it explicitly..

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
disable preference version

The version is informational only so disable it for clarity.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Change fontsize preference to NumberPicker

lint was complaining that the fontsizes were not translated in ja.
Change this to use a NumberPicker instead of the hardcoded array.

Note: requires minSdkVersion bump to 11
Note: fontsize should really not be a string preference!

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>