Added grunt commands to build Amber to a single file
Compressed sprite.amber.png so it can be embedded into CSS
.gitignore: remove duplicate node_modules entry
init.js: fix lint errors
package.json: fixed versions for grunt + pegjs

grunt-shell is removed in favor of NodeJS based compiler
grunt: add MultiTask for compiling with amberc
grunt: import custom amberc task, comment out grunt-shell task
grunt: add amberc config for repl and server
grunt: add lint task for .js files
grunt: add amberc tasks for most amber packages
grunt-amberc: move files to target_dir if specified
grunt: add target_dir to amber core packages
grunt: remove old shell tasks
grunt: add amber_dev task for building amber.js
grunt: use '' instead of "" as string delimiter
grunt: add MultiTask for generating PEG parsers
grunt: add target for creating parser.js
grunt: add license to meta.banner
amberc.js: move start of compilation to AmberC.main()
amberc.js: move handling of commandline parameters to amberc