Merge pull request #25 from Wilfred/master

Improving the docstring of s-split
Add s-replace-all
Remove assoc.el dependency

assoc.el is obsolete with emacs >= 24.2
Merge pull request #26 from ptrv/remove-assoc-el-dep

Package assoc.el is obsolete since emacs 24.2. Remove dependency
Add s-slice-at
Add docs for s-slice-at
Release 1.4.0
Update README
s-lex-format lexical environment formatter thing.
make s-lex-value-when-dynamic :symbol-value by default
Merge pull request #28 from nicferrier/master

s-lex-format - a lexical environment formatter
Update contributions list for @nicferrier
Update docs
Update readme with @ruediger's contributions
Add contributions in changelog.
Add s-all-match-strings
add tests for s-all-match-strings
changes to #30 and #29 to make it ready to commit
Merge pull request #30 from nicferrier/master

tests for #29
Add Geoff Gole (@gsg) to list of contributors