add Exception_Chunk, more informative parser error messages
make _outputMap a propery of Environment
sourcemap as parser option
fix exception cache
remove bootstrap 2.0.2 tests
use Less_Parser::round() to fix colors
correct uri path for sourcemap sources. Fixes #56
move compress option
move strictUnits option
move strictMath option
move relativeUrls option
rename Environment::setOptions() to init()
reset static vars in environment::init()