Add push_front() functions with constant complexity.
Merge pull request #3 from Expander/push_front

Add push_front() functions with constant complexity. Fixes #2
Updated my mail address.
Add test case for push_front.
Add from_str and clean up {push,pop}_back tests.
Add astyle options file.
Update astyle options.
Add CMakeLists.txt.user.
Split tests for Coll::erase_last.
Fix compilation error.
Update SLHAea URL.
Remove .vimrc.local.
Update profiling results.
Make startpos and endpos const.
Update statc analyses.