lkairies-hadoop-append/contrib: Implemented append method in XtreemFSHadoopClient.
lkairies-hadoop-append/contrib: Changed Implementation of append methoed regarding code review (39e9f306270f).
servers: Fixed Nullpointer exception in setSysAttr.
Occured if replication policy is none and default striping policy will be set.
plieser-EtE_encryption/client: Added hash tree (still incomplete)
Merge branch 'lkairies-hadoop-append'

Conflicts:
	contrib/hadoop/src/org/xtreemfs/common/clients/hadoop/XtreemFSFileSystem.java
try to fix generate_initd_scripts.sh for SLE11, CentOS5 and RHEL5
enforce error-free generation of init.d scripts

(exit if any command exists with a non-zero status)
plieser-EtE_encryption/client: Added meta file for encryption.
servers: removed unused contructor from BenchmarkFailedException to retrieve Java 6 compatibility
plieser-EtE_encryption/client: Updated hash tree (still incomplete)
Create README.md
Update README.md
Update README.md
client: skip immutable attributes in fuse_adapter to avoid errors while copying files on OS X (Issue #312)
tests: Add TRAVIS CI

Add TRAVIS CI config (.travis.yml) and script (contrib/unit_tests.sh) for
executing cpp and java unit tests.
plieser-EtE_encryption/client: added wrapper for openssl's Message Digests
tests: removed C++ unittests (temporarily) from Travis-CI
plieser-EtE_encryption/client: Updated hash tree (still incomplete)
Merge remote-tracking branch 'origin/master' into plieser-EtE_encryption