PEG grammar - initial sketch
Add info on installing PEGJS module
Merge remote-tracking branch 'origin/master' into feature/grammar_based_parser

Conflicts:
	README.md
Workload grammar
Full grammar (syntax check only)
Create worklog entry object (WIP)
Merge remote-tracking branch 'origin/master' into feature/grammar_based_parser
Parse worklog
Use 'WorkLogEntry' domain name
Handle basic date format & Substitute parser in AngularJS
Handle @t+-X date format, add timeProvider dependency, return undefined when input cannot be parsed
Merge remote-tracking branch 'origin/master' into feature/grammar_based_parser
Handle day of week and more optional clauses in the WorkLogEntry
Correct return text of Date
Get rid of join()
Handle dates without trailing zeros
Merge remote-tracking branch 'origin/master' into feature/grammar_based_parser
Merge remote-tracking branch 'origin/master' into feature/grammar_based_parser
Simplify grammar
Simplify returning of text() in the grammar