更新安裝Suggests的說明
update RBasic submodule.
Merge pull request #58 from c3h3/master

add data.table package into DESCRIPTION / close #57
Merge remote-tracking branch 'twruser/master'
resolve issues of DA
resolve #56
Solve all issues of RBasic and update the submodule RBasic
move e1071, caret and randomForest to Suggests
Add necessary .R and .rda files.
Merge pull request #61 from wush978/vis_file

resolve #56
Merge pull request #62 from dboyliao/master

Submodule Update
resolve #64
Merge pull request #65 from wush978/estate

resolve #64
Merge pull request #60 from wush978/master

Suggests and packages
Add espeak for Windows. A few rearrangement to slides.
Merge pull request #66 from dboyliao/master

Add espeak for Windows. A few rearrangement to slides.
add submodule slide1, slide2 for ETL and update helper functions

resolve #67
update tested slides
add url for visualization
add document for open slides for ETL1 and ETL2