fixes #196 - parsing now checks timezones correctly and add/set is called correctly
fixed #226 - cache now has a (configurable) upper bound.
Fixes issue with "next" when parsing (e.g. - "next tuesday")
fixing order of ops for "next X" type ops - caused misplaced days
improvements in code coverage and Extras robustness.
better cache clearing behavior
Update core.js

fix for add weekday when the initial date is sat
fixing dumb typo
Update Core-spec.js

adding a test case for addWeekdays when initial day is a Saturday.
Merge pull request #1 from abritinthebay/master

fixing dumb typo
Merge pull request #228 from keemy/master

fix wonky add weekday behavior.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/core/core.js
	src/core/i18n.js
	src/core/parsing_operators.js
	src/core/parsing_translator.js
Remove LRU cache in favor of simpler FIFO cache.