Create a default tmux session only when none defined in tmux.conf

Signed-off-by: Sorin Ionescu <sorin.ionescu@gmail.com>
Support $PYTHONUSERBASE per PEP 370

Signed-off-by: Sorin Ionescu <sorin.ionescu@gmail.com>
Prepend $HOME/bin and $HOME/sbin to path by default
Adjust repo path
- Enable zsh functions 'zargs' 'zmv'
- Activate some handy modules by default
Use short apothegms only in fortune
Add brackets and patterns highlighters
Add simple Java module
Prepend $HOME/bin and $HOME/sbin to path by default
Default to java 1.8 instead of java 1.7
Enable tmux