v0.1.5

Maintenance:

• doc updates (suggested by @jimmykane)

Bug fix:

• bin/pscss: fix inclusion of scss.inc.php (@etu)
• bin/pscss: fix namespace for formatters (@etu)
• @import protocol-relative paths (reported by @antiphp)
• Color names should be case-insensitive (reported by @varun21)
• Fix the return value in case of a parse error (@bgarret)
• placeholder support

Enhancement:

• bin/pscss: @imports relative to explicit input file (suggested by lweel)
• bin/pscss: add -i option to bin/pscss to add import path (@etu)
• bin/pscss: add -p option to specify precision (suggested by @kevinklika)

Increasing parity with reference implementation:

• expression evaluation changes
• color division now truncates instead of rounding
• add "compact" formatter