[flow] lexer: debug prints made more verbose

Change-Id: I35bd29159c33796be161b5a64d9b368ad5defaf8
[flow] parser: fixes string interpolation

Change-Id: I5e2e27ad961ded69bf93a89e2712f858655519e6
some exports

Change-Id: I6f0f000e3449b31d838d81dcfb685956ddf3d9cc
[flow] vm: adds ParamList::replace()

Change-Id: Ibbffa025603a2833f7f3d4050b443d960dfd7f3e
[flow] allow casting from bool to string (results into '1' or '0')

Change-Id: Ic0a93a8a5cac7d61c9413340d3458ec67ce73891
[flow] fixes call arg defaults for type string

Change-Id: Ia4f04e49ce900e7bf7107dd3ba2f1c76c115bbaf
update

Change-Id: I0762321939c500ce4eca70e767ca981e6bb0a0bc
[flow-tool] work on reimplementing assert-handler's detail-print

Change-Id: I4101625659edf80fbc35087400ac72e9fa1e19fe
cleanup

Change-Id: I2e0e829f00552527609768ed7ae3177fd9f463b2
cleanup

Change-Id: I0766adc4fc5e0a41faa73ff10eaecaa3a39164b0
flow-tool: cmdline args updates

Change-Id: I9dad73a9e3ea668572a822ffa1ed3b5fe1602feb
flow: minor work on string interpolation

Change-Id: I36a427d97dde916c370630a6ba75508aed6d63f2
flow-tool: basic functional unit testing mode (-t)

Change-Id: I311bac07f04396777f44e443b875af2c1cda183f
flow-tool: handlers not starting with 'test_' are ignored in unit test mode

Change-Id: Iddaf648a3be24a0cc3ccb37cbe5e2594ac18d1e6
flow-tool: updates other handlers/functions to work against new flow vm code

Change-Id: I0516812ded6004fd24829b3a1b15040848130b01