Add a general build script that is capable to build the InputForamt jar in various distributions of Hadoop

Usage:
/bin/sh build_linux.sh -h

* Users can provide hadoop and hbase home diretory as optional parameters
* If a home directory is not given, this script discovers the directories
  using the following logic
  ** If 'HADOOP_HOME' and 'HBASE_HOME' are defined, the defined values are
     used
  ** Otherwise, if jobtracker or hbase-regionmaster process are running,
     grep the home directories that were used to start these processes.
  ** Otherwise, search in common locationis ('/usr/lib/' for example).
  ** Otherwise, search globally