fixing issue #132

forcing a certain value for IFS in _lp_load_color
implementing default prompt mark

as described in issue #135
updating documentation
Merge pull request #133 from jaesivsm/develop

fixing issue #132 — force the Internal Field Separator
Merge pull request #136 from jaesivsm/issue/135

Issue/135 — default prompt mark
Add an analog clock

Using `LP_TIME_ANALOG`, you can now display an analog clock instead of
numeric values. The analog clock is "accurate" to the nearest half hour.
Merge branch 'develop' of github.com:nojhan/liquidprompt into develop