Fixes to app name detection
Fix downloading native agent on 32bit systems
Merge branch 'maint/0.4.x'
Fix Rails 3.0 spec failures
Bump to 0.5.0-alpha
Bump native agent to 0.5.0-alpha
Handle legacy config settings
Validate file permissions on instrumenter start
Fix C warnings
Merge pull request #228 from tildeio/fix-c-warnings

Fix C warnings
Fix exit status in 1.9.2
Fix initialization specs in 1.9.2
Merge pull request #230 from tildeio/testing-fixes

Testing fixes for 1.9.2
Track object allocations per span
Merge pull request #224 from tildeio/mem-profiling

Memory profiling
Strip SQL comments for better aggregation

Forward-port #227
Pull 0.4.x changelogs
Add changelog for 0.5.0
Bump to 0.5.0-beta1
Bump to 0.5.0-beta2