properly handle amperstands when HTML escaping

escapeExpression, when given a string like "&gt;", was simply returning
"&gt;", not escaping the amperstand. This is incorrect, and makes it
impossible to have Handlebars properly escape a
string like "Escaped, <b> looks like: &lt;b&gt;"

If the intention of the user is to not escape these characters, then
{{{}}} or {{&}} should be used
Bump version to RC1
FIX global leak
Merge pull request #262 from naholyr/patch-1

FIX global leak
Add support for @data variables
Add support for @index in #each
Make deep @data trigger the data option
Reduce duplication
Document lookupData
Update for change in TRR API
Merge branch 'master' of github.com:wycats/handlebars.js
Add a .rspec
cmd flag to compile template with AMD style
1.0.6beta
Ignore sublime projects
Use suite rather than module for module decl
Make jshint happy(er)
Execute mocha test from npm test
Fix loading under node
1.0.6