Some changes to be more xx4h style

* fix git bug based on LANG setting -> alias for git -> 'LANG=C git'
* function added:
  * findTodoLatex -> finds '%TODO' tags in latex file,
    prints matched sections
* added openjdk-1.7.0 to PATH
* alias 'yum-update' for 'sudo yum update --changelog'
* 'unsetopt no_match' to use wildcard on commands like in bash
* inserted whitespace at beginning of PS1 to get a nicer look
  (especially if working in a python virutalenv via 'workon')