fix for lifetime/borrow: ambiguous type error
Close #148
  - Added the explicit type declaration for `stack_integer`
  - re-aligned lifetime lines for readability
  - Tested successfully on the live site to verify that it works
Fix more int/float fallback removal errors
Merge pull request #149 from tjkierzkowski/issue_148

fix for lifetime/borrow: ambiguous type error
Clarify move/copy terminology. Closes #133
Merge pull request #142 from japaric/clarify-move

Clarify move/copy terminology. Closes #133
link to explanation of r-value and l-value
link to explanation of lint
generics/input.md: Fix pluralization mistake
Merge pull request #153 from alxgnon/typo-fix

generics/input.md: Fix pluralization mistake
mod: fix typo
update.rs: Prepend example number to the titles. Closes #126
Merge pull request #152 from vks/links

Link to explanations of r-value, l-value and lint
fix-edit-button: handle new hierarchy of nested examples
travis: Use packaged rust-nightly
{macros/dry,simd/simd_add}: make macros hygienic
The "crate_id" attribute is deprecated
tasks: fix typo
literals: fix typo. next chapter is wrong, changing to chapter five.
fix method name: read_to_str should be read_to_string
Fix method name: read_to_str -> read_to_string

In one of the recent nightlies, `read_to_str` was renamed to
`read_to_string`. The PR fixes the spots where I noticed the old
usage.