Fix typos in README and CONTRIBUTING.
Fix spaces in source
Fix tabs in source (fossil support)
Support for counting screen sessions with parameters

In some cases (multi user enabled in screen for example), the count of
detached screen sessions was incorrect. The command to locate these has
been improved using a more tolerant regex, which also makes sure the
"Detached" word appears inside a parenthesis (so it's not an attached
screen to a machine called Detach for example).
screen: stricter matching in detached sessions counting
Temperature/Linux: fetch using "acpi -t"
_lp_temp_acpi: handle multiple temperature sensors (multi CPU)
_lp_temp_*: get result through variable instead of stdout
Use LP_MARK_PREFIX="\n" to seperate the prompt into two lines
WIP: add backend for wifi level

Very early work in progress.
Need help to design the output. LP_MARK_WIFI?
Fix battery indicator on Darwin
Improve support for MacOS X directory icon (update_terminal_cwd)

Improvements:
- check if update_terminal_cwd is available instead of relying on the
  kernel version
- test the feature once at init time instead of at prompt time

Note that zsh is not yet supported for that feature unless the
update_terminal_cwd has been imported in your environment.
I think it would be possible to support it, but I don't have access to
MacOS X machines, so... patches are welcome!
cpu_load: merge back Darwin and FreeBSD
Run the old PROMPT_COMMAND with eval

Because it may contain multiple commands separated with ';'.
See #196.
Remove update_terminal_cwd from _LP_OLD_PROMPT_COMMAND

... as we now have special handling for that feature of the terminal in
_LP_TERM_IPDATE_DIR
Merge branch 'refactor/update_terminal_cwd' into develop

Fixes OS X issues #196, #208, #238.
Fix usage of $_LP_SHELL_bash
keeping liquidprompt from overriding PROMPT_DIRTRIM when path shortening is disabled
Reset LP_OLD_PWD on startup

Reset the LP_OLD_PWD variable on startup.
This makes debugging easier: previously we had to change directory
after a reload to see the changes of the new code for the PWD-cached
parts.
bash/PROMPT_DIRTRIM: complete rewrite

Complete rewrite of the _lp_get_dirtrim into _lp_set_dirtrim with a much
faster implementation that avoids char by char processing of $PWD.
Also use (( )) builtin.