Update screenshots url in README.md
[sexy theme] remove extra reset which finds its way into stdout

Stray sgr0 was emitted to stdout, corrupting application output.
Improved prompt speed when hg is not installed.

Prevented bash from walking the path looking for hg when it is not
installed during each prompt refresh.
Merge pull request #272 from yachi/patch-1

Update screenshots url in README.md
Merge pull request #273 from betamatt/patch-1

[sexy theme] remove extra reset which finds its way into stdout
Git-related fixes for themes.

Improved prompt display speed when git is not installed by
preventing bash from walking the path before each prompt.

Removed pesky stash-related git error message when in bare repos.
Merge pull request #275 from caguettaz/world

Improved prompt speed when hg is not installed.
Add a pyedit command thanks to @srossross