Slow lexer and parser scaffold.
Replace hand-coded lexer with faster hacky lexer.
Descriptive comment for lexer
Bring back the lexer
Better lexer
Fancy StringScanner based lexer
Use invoke_drop in map filter
Merge pull request #230 from Shopify/use_invoke_drop_in_map

Use invoke_drop in map filter
Basic expression parsing
Add license to gemspec, closes #231
New variable parser!
Fix benchmarks to use only valid liquid.
Fix profiler
Always call 'to_liquid' on staff in map filter and allow to_liquid to be called on drops
Merge pull request #232 from Shopify/to_liquid_stuff

Always call 'to_liquid' on stuff in map filter and allow to_liquid to be...
Fix mapping over procs
Merge pull request #234 from Shopify/fix_mapping_procs

Fix mapping over procs
Update README.md
Unfinished if statement parser.
Test a different lexer architechture