Fix CMainFrame::ParseColor memory leak

Closed #3
update developer/contributor list
Indicate screen mode in right click menu, close #9
Show 'Web Search' only when text selection
Append selected text to "Web Search"
Cut long web search string
Use a better way for i18n
Remove unused method
update .gitignore
fix hotkey handling regression

close #11
debian: set VCS to GitHub repository
Test different configure in travis-ci

Closed #4
Add default configure in travis-ci
Disable broken configure in travis-ci
Fix CFLAGS and CXXFLAGS in travis-ci