updated readme.md
small fixes to readme.md
Fixing download link in README
Merge pull request #7 from deniszh/master

Fixing download link in README
added more function definitions, added small hack to make randomWalk and countLine that do not take any series work with the parser and target editor (the whole target editor and parsing & back to target rendering needs to be rewritten to handle functions that take multiple series)
updated default example dashboard with welcome text and an example graph using randomWalk function
Fixes #1, duplicate panel with 3 colspan remaining on row
changes to flot.events
added annotations to roadmap
small refactoring
fixed loading spinner position and other minor changes
improved drag and drop
ported back some improvements from kibana
Fixes #4, also improves responsive layout for mobiles
updated readme and bumped  version
Partial fix for #10 , the lexer & parser can now handle curly brace, but target editor needs to be updated to support selecting multiple segment nodes
Fixes #12, operation without elastic search should now with without error
clean up unused code, left over from kibana
removed more unused code
Initial work on #9 (millisecond y axis formater)