merge with xmind-source-3.3.1.201212250029
restructure the projects
use small revision for sheets instead
upgrade bouncecastle to 1.47 to fix the error:
java.lang.NoSuchMethodError: org/bouncycastle/asn1/ASN1InputStream.readObject()Lorg/bouncycastle/asn1/ASN1Primitive;
make the .product work
Merge branch 'v3.3.1'