Pin versions to those we know work

Cargo.lock

@@ -7,7 +7,7 @@ dependencies = [
  "datetime 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "git2 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "locale 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "natord 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -101,6 +101,11 @@ name = "libc"
 version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "libc"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "libgit2-sys"
 version = "0.3.6"

Cargo.toml

@@ -10,16 +10,16 @@ name = "exa"
 ansi_term = "0.7.0"
 bitflags = "0.1"
 datetime = "0.4.1"
-getopts = "0.2.1"
-libc = "*"
+getopts = "0.2.14"
+libc = "0.2.0"
 locale = "0.1.2"
 natord = "1.0.7"
-num_cpus = "*"
+num_cpus = "0.2.7"
 number_prefix = "0.2.3"
 scoped_threadpool = "*"
-term_grid = "*"
-unicode-width = "*"
-users = "0.4.0"
+term_grid = "0.1.2"
+unicode-width = "0.1.3"
+users = "0.4.3"
 
 [features]
 default = [ "git" ]
@@ -31,5 +31,5 @@ debug = false
 lto = true
 
 [dependencies.git2]
-version = "0.3"
+version = "0.3.2"
 optional = true