Merge pull request wp-cli#104 from Luxian/master

Bring back default values and fix tests

Merge pull request wp-cli#94 from wp-cli/decolorize-safe-str-pad

Only decolorize in `cli\safe_str_pad()` when colorizing

Merge pull request wp-cli#93 from wp-cli/placeholder-character-colorize

Use a more impossible placeholder pattern in `Colors::colorize()`

Merge pull request wp-cli#83 from tiagohillebrandt/master

Verifies if exec is not in disable_functions directive

Merge pull request wp-cli#79 from rantonmattei/2015-02-26--Default-op…

…tion-value

Fix the static variable in the Lexer + fix option populating to default ...

Merge pull request wp-cli#73 from wp-cli/fix-undefined-mb

Check that `mb_detect_encoding()` exists too before using

Merge pull request wp-cli#69 from armab/bug/colorized-strings-in-asci…

…i-table

Fixed incorrect lengths for colorized strings in ASCII table

Recommend mbstring as an extension

Merge pull request wp-cli#64 from jesseoverright/master

Adds fallback for mb_strlen, fixes wp-cli#61

Merge pull request wp-cli#56 from wp-cli/safe-str-pad

Encoding-safe string padding