use flt_rst instead of flt
engine fix instance value building
fix fliter text indent for ActionFinish
test/core_vimrc add setting number
enlarge test/run.py sleep time
add test of Echo|post
common.xpt.vim: Echo returns action dict
engine: xptemplate.vim by default text is to be built
engine: remove 'toBuild', use flt_rst.action == 'build'
engine: default value accept action 'text'

fix Echo() for default value
engine: HandleDefaultValueAction refined
engine: s:FillinLeadingPlaceHolderAndSelect simplify
Merge branch 'internal' into mix
Merge branches 'f.build', 'f.cases', 'f.conf', 'f.doc', 'f.docindex', 'f.engine', 'f.eval', 'f.filter', 'f.indent', 'f.log', 'f.once', 'f.parser', 'f.priority', 'f.pum', 'f.readme', 'f.replace', 'f.snipfunc', 'f.snpt', 'f.syntax', 'f.test', 'f.unittest', 'f.util', 't.sniptest', 'snp.cond-c', 'snp.cpp', 'snp.eruby', 'snp.html', 'snp.htmldjango' and 'snp.php' into mix
update doc