[DEV] bug fix
[Dev]fix abstract scheme bugs
[DEV]fix avarage & variant 's problem of returning ref
[DEV]
implement variance, change function name /average/ to /mean/
[DEV] bugfix
[Fix] two fix to SchemeBuffer

add forceRead to schemeBuffer. change the buffer size to 1000
[update] change todo list
[DEV]now program shall exits if config not read
[DEV] fix a indicatorWrapper problem
which wrongly calced the offset of the year
[DEV] hm. hah
[DEV]change schDouble from float to double
[dev]remove all debugging mesgs. these will now be preserved in debugger
[DEV] add some debug information
[DEV] ColNotExist now can return it's col = +b
[DEV] bugfix
[deV] remove debug info
[DEV] add IndicatorIndexOutOfRange exception
Merge remote-tracking branch 'upstream/master' into dev